diff --git a/packages/cactus-cmd-api-server/src/main/typescript/api-server.ts b/packages/cactus-cmd-api-server/src/main/typescript/api-server.ts
index 31c31b0798..c9f94af4cc 100644
--- a/packages/cactus-cmd-api-server/src/main/typescript/api-server.ts
+++ b/packages/cactus-cmd-api-server/src/main/typescript/api-server.ts
@@ -120,6 +120,7 @@ export class ApiServer {
         pollingIntervalInMin: 1,
       });
     }
+    this.prometheusExporter.startMetricsCollection();
     this.prometheusExporter.setTotalPluginImports(this.getPluginImportsCount());
 
     this.log = LoggerProvider.getOrCreate({
diff --git a/packages/cactus-cmd-api-server/src/main/typescript/prometheus-exporter/metrics.ts b/packages/cactus-cmd-api-server/src/main/typescript/prometheus-exporter/metrics.ts
index 662ca99d7c..3e38c0c28f 100644
--- a/packages/cactus-cmd-api-server/src/main/typescript/prometheus-exporter/metrics.ts
+++ b/packages/cactus-cmd-api-server/src/main/typescript/prometheus-exporter/metrics.ts
@@ -4,6 +4,7 @@ export const K_CACTUS_API_SERVER_TOTAL_PLUGIN_IMPORTS =
   "cactus_api_server_total_plugin_imports";
 
 export const totalTxCount = new Gauge({
+  registers: [],
   name: K_CACTUS_API_SERVER_TOTAL_PLUGIN_IMPORTS,
   help: "Total number of plugins imported",
   labelNames: ["type"],
diff --git a/packages/cactus-cmd-api-server/src/main/typescript/prometheus-exporter/prometheus-exporter.ts b/packages/cactus-cmd-api-server/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
index 7b464c52cd..afc62894f0 100644
--- a/packages/cactus-cmd-api-server/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
+++ b/packages/cactus-cmd-api-server/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
@@ -1,6 +1,7 @@
-import promClient from "prom-client";
+import promClient, { Registry } from "prom-client";
 import { TotalPluginImports } from "./response.type";
 import { K_CACTUS_API_SERVER_TOTAL_PLUGIN_IMPORTS } from "./metrics";
+import { totalTxCount } from "./metrics";
 import { collectMetrics } from "./data-fetcher";
 
 export interface IPrometheusExporterOptions {
@@ -10,12 +11,14 @@ export interface IPrometheusExporterOptions {
 export class PrometheusExporter {
   public readonly metricsPollingIntervalInMin: number;
   public readonly totalPluginImports: TotalPluginImports = { counter: 0 };
+  public readonly registry: Registry;
 
   constructor(
     public readonly prometheusExporterOptions: IPrometheusExporterOptions,
   ) {
     this.metricsPollingIntervalInMin =
       prometheusExporterOptions.pollingIntervalInMin || 1;
+    this.registry = new Registry();
   }
 
   public setTotalPluginImports(totalPluginImports: number): void {
@@ -24,15 +27,14 @@ export class PrometheusExporter {
   }
 
   public async getPrometheusMetrics(): Promise<string> {
-    const result = await promClient.register.getSingleMetricAsString(
+    const result = await this.registry.getSingleMetricAsString(
       K_CACTUS_API_SERVER_TOTAL_PLUGIN_IMPORTS,
     );
     return result;
   }
 
   public startMetricsCollection(): void {
-    const Registry = promClient.Registry;
-    const register = new Registry();
-    promClient.collectDefaultMetrics({ register });
+    this.registry.registerMetric(totalTxCount);
+    promClient.collectDefaultMetrics({ register: this.registry });
   }
 }
diff --git a/packages/cactus-plugin-consortium-manual/src/main/typescript/plugin-consortium-manual.ts b/packages/cactus-plugin-consortium-manual/src/main/typescript/plugin-consortium-manual.ts
index db527b2767..9187e59980 100644
--- a/packages/cactus-plugin-consortium-manual/src/main/typescript/plugin-consortium-manual.ts
+++ b/packages/cactus-plugin-consortium-manual/src/main/typescript/plugin-consortium-manual.ts
@@ -84,6 +84,7 @@ export class PluginConsortiumManual
       this.prometheusExporter,
       `${fnTag} options.prometheusExporter`,
     );
+    this.prometheusExporter.startMetricsCollection();
     this.prometheusExporter.setNodeCount(this.getNodeCount());
   }
 
diff --git a/packages/cactus-plugin-consortium-manual/src/main/typescript/prometheus-exporter/metrics.ts b/packages/cactus-plugin-consortium-manual/src/main/typescript/prometheus-exporter/metrics.ts
index 55d35149ed..b965dd39f4 100644
--- a/packages/cactus-plugin-consortium-manual/src/main/typescript/prometheus-exporter/metrics.ts
+++ b/packages/cactus-plugin-consortium-manual/src/main/typescript/prometheus-exporter/metrics.ts
@@ -4,6 +4,7 @@ export const K_CACTUS_CONSORTIUM_MANUAL_TOTAL_NODE_COUNT =
   "cactus_consortium_manual_total_node_count";
 
 export const totalTxCount = new Gauge({
+  registers: [],
   name: K_CACTUS_CONSORTIUM_MANUAL_TOTAL_NODE_COUNT,
   help: "Total cactus node count",
   labelNames: ["type"],
diff --git a/packages/cactus-plugin-consortium-manual/src/main/typescript/prometheus-exporter/prometheus-exporter.ts b/packages/cactus-plugin-consortium-manual/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
index 4208c86359..6c07c56008 100644
--- a/packages/cactus-plugin-consortium-manual/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
+++ b/packages/cactus-plugin-consortium-manual/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
@@ -1,4 +1,4 @@
-import promClient from "prom-client";
+import promClient, { Registry } from "prom-client";
 import { NodeCount } from "./response.type";
 import {
   totalTxCount,
@@ -12,12 +12,14 @@ export interface IPrometheusExporterOptions {
 export class PrometheusExporter {
   public readonly metricsPollingIntervalInMin: number;
   public readonly nodeCount: NodeCount = { counter: 0 };
+  public readonly registry: Registry;
 
   constructor(
     public readonly prometheusExporterOptions: IPrometheusExporterOptions,
   ) {
     this.metricsPollingIntervalInMin =
       prometheusExporterOptions.pollingIntervalInMin || 1;
+    this.registry = new Registry();
   }
 
   public setNodeCount(nodeCount: number): void {
@@ -28,15 +30,14 @@ export class PrometheusExporter {
   }
 
   public async getPrometheusMetrics(): Promise<string> {
-    const result = await promClient.register.getSingleMetricAsString(
+    const result = await this.registry.getSingleMetricAsString(
       K_CACTUS_CONSORTIUM_MANUAL_TOTAL_NODE_COUNT,
     );
     return result;
   }
 
   public startMetricsCollection(): void {
-    const Registry = promClient.Registry;
-    const register = new Registry();
-    promClient.collectDefaultMetrics({ register });
+    this.registry.registerMetric(totalTxCount);
+    promClient.collectDefaultMetrics({ register: this.registry });
   }
 }
diff --git a/packages/cactus-plugin-keychain-memory/src/main/typescript/plugin-keychain-memory.ts b/packages/cactus-plugin-keychain-memory/src/main/typescript/plugin-keychain-memory.ts
index 38d95f4d1a..784da89976 100644
--- a/packages/cactus-plugin-keychain-memory/src/main/typescript/plugin-keychain-memory.ts
+++ b/packages/cactus-plugin-keychain-memory/src/main/typescript/plugin-keychain-memory.ts
@@ -58,6 +58,7 @@ export class PluginKeychainMemory {
       this.prometheusExporter,
       `${fnTag} options.prometheusExporter`,
     );
+    this.prometheusExporter.startMetricsCollection();
 
     this.log.info(`Created ${this.className}. KeychainID=${opts.keychainId}`);
     this.log.warn(
diff --git a/packages/cactus-plugin-keychain-memory/src/main/typescript/prometheus-exporter/metrics.ts b/packages/cactus-plugin-keychain-memory/src/main/typescript/prometheus-exporter/metrics.ts
index cf20d28cc9..ff644d22cf 100644
--- a/packages/cactus-plugin-keychain-memory/src/main/typescript/prometheus-exporter/metrics.ts
+++ b/packages/cactus-plugin-keychain-memory/src/main/typescript/prometheus-exporter/metrics.ts
@@ -4,6 +4,7 @@ export const K_CACTUS_KEYCHAIN_MEMORY_TOTAL_KEY_COUNT =
   "cactus_keychain_memory_total_key_count";
 
 export const totalKeyCount = new Gauge({
+  registers: [],
   name: K_CACTUS_KEYCHAIN_MEMORY_TOTAL_KEY_COUNT,
   help: "Total keys present in memory",
   labelNames: ["type"],
diff --git a/packages/cactus-plugin-keychain-memory/src/main/typescript/prometheus-exporter/prometheus-exporter.ts b/packages/cactus-plugin-keychain-memory/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
index 4e3c22985b..a0975c45bc 100644
--- a/packages/cactus-plugin-keychain-memory/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
+++ b/packages/cactus-plugin-keychain-memory/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
@@ -1,7 +1,9 @@
-import promClient from "prom-client";
+import promClient, { Registry } from "prom-client";
 import { KeyCount } from "./response.type";
 import { collectMetrics } from "./data-fetcher";
 import { K_CACTUS_KEYCHAIN_MEMORY_TOTAL_KEY_COUNT } from "./metrics";
+import { totalKeyCount } from "./metrics";
+
 export interface IPrometheusExporterOptions {
   pollingIntervalInMin?: number;
 }
@@ -9,12 +11,14 @@ export interface IPrometheusExporterOptions {
 export class PrometheusExporter {
   public readonly metricsPollingIntervalInMin: number;
   public readonly keyCount: KeyCount = { counter: 0 };
+  public readonly registry: Registry;
 
   constructor(
     public readonly prometheusExporterOptions: IPrometheusExporterOptions,
   ) {
     this.metricsPollingIntervalInMin =
       prometheusExporterOptions.pollingIntervalInMin || 1;
+    this.registry = new Registry();
   }
 
   public setTotalKeyCounter(keyCount: number): void {
@@ -23,15 +27,14 @@ export class PrometheusExporter {
   }
 
   public async getPrometheusMetrics(): Promise<string> {
-    const result = await promClient.register.getSingleMetricAsString(
+    const result = await this.registry.getSingleMetricAsString(
       K_CACTUS_KEYCHAIN_MEMORY_TOTAL_KEY_COUNT,
     );
     return result;
   }
 
   public startMetricsCollection(): void {
-    const Registry = promClient.Registry;
-    const register = new Registry();
-    promClient.collectDefaultMetrics({ register });
+    this.registry.registerMetric(totalKeyCount);
+    promClient.collectDefaultMetrics({ register: this.registry });
   }
 }
diff --git a/packages/cactus-plugin-keychain-vault/src/main/typescript/plugin-keychain-vault.ts b/packages/cactus-plugin-keychain-vault/src/main/typescript/plugin-keychain-vault.ts
index c105017b5e..9c7dda5a59 100644
--- a/packages/cactus-plugin-keychain-vault/src/main/typescript/plugin-keychain-vault.ts
+++ b/packages/cactus-plugin-keychain-vault/src/main/typescript/plugin-keychain-vault.ts
@@ -114,6 +114,7 @@ export class PluginKeychainVault implements IPluginWebService, IPluginKeychain {
       this.prometheusExporter,
       `${fnTag} options.prometheusExporter`,
     );
+    this.prometheusExporter.startMetricsCollection();
 
     this.log.info(`Created Vault backend OK. Endpoint=${this.endpoint}`);
 
diff --git a/packages/cactus-plugin-keychain-vault/src/main/typescript/prometheus-exporter/metrics.ts b/packages/cactus-plugin-keychain-vault/src/main/typescript/prometheus-exporter/metrics.ts
index 2f65f2e0c7..b2776cc0f5 100644
--- a/packages/cactus-plugin-keychain-vault/src/main/typescript/prometheus-exporter/metrics.ts
+++ b/packages/cactus-plugin-keychain-vault/src/main/typescript/prometheus-exporter/metrics.ts
@@ -4,6 +4,7 @@ export const K_CACTUS_KEYCHAIN_VAULT_MANAGED_KEY_COUNT =
   "cactus_keychain_vault_managed_key_count";
 
 export const totalKeyCount = new Gauge({
+  registers: [],
   name: K_CACTUS_KEYCHAIN_VAULT_MANAGED_KEY_COUNT,
   help:
     "The number of keys that were set in the backing Vault deployment via this specific keychain plugin instance",
diff --git a/packages/cactus-plugin-keychain-vault/src/main/typescript/prometheus-exporter/prometheus-exporter.ts b/packages/cactus-plugin-keychain-vault/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
index f25017e07c..e05f3e26ff 100644
--- a/packages/cactus-plugin-keychain-vault/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
+++ b/packages/cactus-plugin-keychain-vault/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
@@ -1,7 +1,8 @@
-import promClient from "prom-client";
+import promClient, { Registry } from "prom-client";
 import { VaultKeys } from "./response.type";
 import { collectMetrics } from "./data-fetcher";
 import { K_CACTUS_KEYCHAIN_VAULT_MANAGED_KEY_COUNT } from "./metrics";
+import { totalKeyCount } from "./metrics";
 
 export interface IPrometheusExporterOptions {
   pollingIntervalInMin?: number;
@@ -10,12 +11,14 @@ export interface IPrometheusExporterOptions {
 export class PrometheusExporter {
   public readonly metricsPollingIntervalInMin: number;
   public readonly vaultKeys: VaultKeys = new Map();
+  public readonly registry: Registry;
 
   constructor(
     public readonly prometheusExporterOptions: IPrometheusExporterOptions,
   ) {
     this.metricsPollingIntervalInMin =
       prometheusExporterOptions.pollingIntervalInMin || 1;
+    this.registry = new Registry();
   }
 
   public setTotalKeyCounter(key: string, operation: string): void {
@@ -28,15 +31,14 @@ export class PrometheusExporter {
   }
 
   public async getPrometheusMetrics(): Promise<string> {
-    const result = await promClient.register.getSingleMetricAsString(
+    const result = await this.registry.getSingleMetricAsString(
       K_CACTUS_KEYCHAIN_VAULT_MANAGED_KEY_COUNT,
     );
     return result;
   }
 
   public startMetricsCollection(): void {
-    const Registry = promClient.Registry;
-    const register = new Registry();
-    promClient.collectDefaultMetrics({ register });
+    this.registry.registerMetric(totalKeyCount);
+    promClient.collectDefaultMetrics({ register: this.registry });
   }
 }
diff --git a/packages/cactus-plugin-ledger-connector-besu/src/main/typescript/prometheus-exporter/metrics.ts b/packages/cactus-plugin-ledger-connector-besu/src/main/typescript/prometheus-exporter/metrics.ts
index 6b2faa9435..8b1addf43e 100644
--- a/packages/cactus-plugin-ledger-connector-besu/src/main/typescript/prometheus-exporter/metrics.ts
+++ b/packages/cactus-plugin-ledger-connector-besu/src/main/typescript/prometheus-exporter/metrics.ts
@@ -3,6 +3,7 @@ import { Gauge } from "prom-client";
 export const K_CACTUS_BESU_TOTAL_TX_COUNT = "cactus_besu_total_tx_count";
 
 export const totalTxCount = new Gauge({
+  registers: [],
   name: "cactus_besu_total_tx_count",
   help: "Total transactions executed",
   labelNames: ["type"],
diff --git a/packages/cactus-plugin-ledger-connector-besu/src/main/typescript/prometheus-exporter/prometheus-exporter.ts b/packages/cactus-plugin-ledger-connector-besu/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
index 28eab02588..4ece66e25e 100644
--- a/packages/cactus-plugin-ledger-connector-besu/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
+++ b/packages/cactus-plugin-ledger-connector-besu/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
@@ -1,7 +1,8 @@
-import promClient from "prom-client";
+import promClient, { Registry } from "prom-client";
 import { Transactions } from "./response.type";
 import { collectMetrics } from "./data-fetcher";
 import { K_CACTUS_BESU_TOTAL_TX_COUNT } from "./metrics";
+import { totalTxCount } from "./metrics";
 
 export interface IPrometheusExporterOptions {
   pollingIntervalInMin?: number;
@@ -10,12 +11,14 @@ export interface IPrometheusExporterOptions {
 export class PrometheusExporter {
   public readonly metricsPollingIntervalInMin: number;
   public readonly transactions: Transactions = { counter: 0 };
+  public readonly registry: Registry;
 
   constructor(
     public readonly prometheusExporterOptions: IPrometheusExporterOptions,
   ) {
     this.metricsPollingIntervalInMin =
       prometheusExporterOptions.pollingIntervalInMin || 1;
+    this.registry = new Registry();
   }
 
   public addCurrentTransaction(): void {
@@ -23,15 +26,14 @@ export class PrometheusExporter {
   }
 
   public async getPrometheusMetrics(): Promise<string> {
-    const result = await promClient.register.getSingleMetricAsString(
+    const result = await this.registry.getSingleMetricAsString(
       K_CACTUS_BESU_TOTAL_TX_COUNT,
     );
     return result;
   }
 
   public startMetricsCollection(): void {
-    const Registry = promClient.Registry;
-    const register = new Registry();
-    promClient.collectDefaultMetrics({ register });
+    this.registry.registerMetric(totalTxCount);
+    promClient.collectDefaultMetrics({ register: this.registry });
   }
 }
diff --git a/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/plugin-ledger-connector-corda.ts b/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/plugin-ledger-connector-corda.ts
index 68e7337927..c799c7403e 100644
--- a/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/plugin-ledger-connector-corda.ts
+++ b/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/plugin-ledger-connector-corda.ts
@@ -77,6 +77,7 @@ export class PluginLedgerConnectorCorda
       this.prometheusExporter,
       `${fnTag} options.prometheusExporter`,
     );
+    this.prometheusExporter.startMetricsCollection();
   }
 
   public getPrometheusExporter(): PrometheusExporter {
diff --git a/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/prometheus-exporter/metrics.ts b/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/prometheus-exporter/metrics.ts
index 57734600b2..4569ce9f14 100644
--- a/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/prometheus-exporter/metrics.ts
+++ b/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/prometheus-exporter/metrics.ts
@@ -3,6 +3,7 @@ import { Gauge } from "prom-client";
 export const K_CACTUS_CORDA_TOTAL_TX_COUNT = "cactus_corda_total_tx_count";
 
 export const totalTxCount = new Gauge({
+  registers: [],
   name: K_CACTUS_CORDA_TOTAL_TX_COUNT,
   help: "Total transactions executed",
   labelNames: ["type"],
diff --git a/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/prometheus-exporter/prometheus-exporter.ts b/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
index 052ec6c3a8..aaa6b459b9 100644
--- a/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
+++ b/packages/cactus-plugin-ledger-connector-corda/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
@@ -1,4 +1,4 @@
-import promClient from "prom-client";
+import promClient, { Registry } from "prom-client";
 import { Transactions } from "./response.type";
 import { totalTxCount, K_CACTUS_CORDA_TOTAL_TX_COUNT } from "./metrics";
 
@@ -9,12 +9,14 @@ export interface IPrometheusExporterOptions {
 export class PrometheusExporter {
   public readonly metricsPollingIntervalInMin: number;
   public readonly transactions: Transactions = { counter: 0 };
+  public readonly registry: Registry;
 
   constructor(
     public readonly prometheusExporterOptions: IPrometheusExporterOptions,
   ) {
     this.metricsPollingIntervalInMin =
       prometheusExporterOptions.pollingIntervalInMin || 1;
+    this.registry = new Registry();
   }
 
   public addCurrentTransaction(): void {
@@ -25,15 +27,14 @@ export class PrometheusExporter {
   }
 
   public async getPrometheusMetrics(): Promise<string> {
-    const result = await promClient.register.getSingleMetricAsString(
+    const result = await this.registry.getSingleMetricAsString(
       K_CACTUS_CORDA_TOTAL_TX_COUNT,
     );
     return result;
   }
 
   public startMetricsCollection(): void {
-    const Registry = promClient.Registry;
-    const register = new Registry();
-    promClient.collectDefaultMetrics({ register });
+    this.registry.registerMetric(totalTxCount);
+    promClient.collectDefaultMetrics({ register: this.registry });
   }
 }
diff --git a/packages/cactus-plugin-ledger-connector-fabric/src/main/typescript/prometheus-exporter/prometheus-exporter.ts b/packages/cactus-plugin-ledger-connector-fabric/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
index 733cb6f736..8939683942 100644
--- a/packages/cactus-plugin-ledger-connector-fabric/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
+++ b/packages/cactus-plugin-ledger-connector-fabric/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
@@ -1,4 +1,4 @@
-import promClient from "prom-client";
+import promClient, { Registry } from "prom-client";
 import { Transactions } from "./response.type";
 import { totalTxCount, K_CACTUS_FABRIC_TOTAL_TX_COUNT } from "./metrics";
 
@@ -9,12 +9,14 @@ export interface IPrometheusExporterOptions {
 export class PrometheusExporter {
   public readonly metricsPollingIntervalInMin: number;
   public readonly transactions: Transactions = { counter: 0 };
+  public readonly registry: Registry;
 
   constructor(
     public readonly prometheusExporterOptions: IPrometheusExporterOptions,
   ) {
     this.metricsPollingIntervalInMin =
       prometheusExporterOptions.pollingIntervalInMin || 1;
+    this.registry = new Registry();
   }
 
   public addCurrentTransaction(): void {
@@ -25,15 +27,14 @@ export class PrometheusExporter {
   }
 
   public async getPrometheusMetrics(): Promise<string> {
-    const result = await promClient.register.getSingleMetricAsString(
+    const result = await this.registry.getSingleMetricAsString(
       K_CACTUS_FABRIC_TOTAL_TX_COUNT,
     );
     return result;
   }
 
   public startMetricsCollection(): void {
-    const Registry = promClient.Registry;
-    const register = new Registry();
-    promClient.collectDefaultMetrics({ register });
+    this.registry.registerMetric(totalTxCount);
+    promClient.collectDefaultMetrics({ register: this.registry });
   }
 }
diff --git a/packages/cactus-plugin-ledger-connector-quorum/src/main/typescript/prometheus-exporter/metrics.ts b/packages/cactus-plugin-ledger-connector-quorum/src/main/typescript/prometheus-exporter/metrics.ts
index 2e57bea80e..a620886d60 100644
--- a/packages/cactus-plugin-ledger-connector-quorum/src/main/typescript/prometheus-exporter/metrics.ts
+++ b/packages/cactus-plugin-ledger-connector-quorum/src/main/typescript/prometheus-exporter/metrics.ts
@@ -3,6 +3,7 @@ import { Gauge } from "prom-client";
 export const K_CACTUS_QUORUM_TOTAL_TX_COUNT = "cactus_quorum_total_tx_count";
 
 export const totalTxCount = new Gauge({
+  registers: [],
   name: K_CACTUS_QUORUM_TOTAL_TX_COUNT,
   help: "Total transactions executed",
   labelNames: ["type"],
diff --git a/packages/cactus-plugin-ledger-connector-quorum/src/main/typescript/prometheus-exporter/prometheus-exporter.ts b/packages/cactus-plugin-ledger-connector-quorum/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
index c09d47f2ba..462c8af871 100644
--- a/packages/cactus-plugin-ledger-connector-quorum/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
+++ b/packages/cactus-plugin-ledger-connector-quorum/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
@@ -1,7 +1,8 @@
-import promClient from "prom-client";
+import promClient, { Registry } from "prom-client";
 import { Transactions } from "./response.type";
 import { collectMetrics } from "./data.fetcher";
 import { K_CACTUS_QUORUM_TOTAL_TX_COUNT } from "./metrics";
+import { totalTxCount } from "./metrics";
 
 export interface IPrometheusExporterOptions {
   pollingIntervalInMin?: number;
@@ -10,12 +11,14 @@ export interface IPrometheusExporterOptions {
 export class PrometheusExporter {
   public readonly metricsPollingIntervalInMin: number;
   public readonly transactions: Transactions = { counter: 0 };
+  public readonly registry: Registry;
 
   constructor(
     public readonly prometheusExporterOptions: IPrometheusExporterOptions,
   ) {
     this.metricsPollingIntervalInMin =
       prometheusExporterOptions.pollingIntervalInMin || 1;
+    this.registry = new Registry();
   }
 
   public addCurrentTransaction(): void {
@@ -23,15 +26,14 @@ export class PrometheusExporter {
   }
 
   public async getPrometheusMetrics(): Promise<string> {
-    const result = await promClient.register.getSingleMetricAsString(
+    const result = await this.registry.getSingleMetricAsString(
       K_CACTUS_QUORUM_TOTAL_TX_COUNT,
     );
     return result;
   }
 
   public startMetricsCollection(): void {
-    const Registry = promClient.Registry;
-    const register = new Registry();
-    promClient.collectDefaultMetrics({ register });
+    this.registry.registerMetric(totalTxCount);
+    promClient.collectDefaultMetrics({ register: this.registry });
   }
 }
diff --git a/packages/cactus-plugin-ledger-connector-xdai/src/main/typescript/prometheus-exporter/metrics.ts b/packages/cactus-plugin-ledger-connector-xdai/src/main/typescript/prometheus-exporter/metrics.ts
index 0a46752f6f..4fe5181e4a 100644
--- a/packages/cactus-plugin-ledger-connector-xdai/src/main/typescript/prometheus-exporter/metrics.ts
+++ b/packages/cactus-plugin-ledger-connector-xdai/src/main/typescript/prometheus-exporter/metrics.ts
@@ -3,6 +3,7 @@ import { Gauge } from "prom-client";
 export const K_CACTUS_XDAI_TOTAL_TX_COUNT = "cactus_xdai_total_tx_count";
 
 export const totalTxCount = new Gauge({
+  registers: [],
   name: "cactus_xdai_total_tx_count",
   help: "Total transactions executed",
   labelNames: ["type"],
diff --git a/packages/cactus-plugin-ledger-connector-xdai/src/main/typescript/prometheus-exporter/prometheus-exporter.ts b/packages/cactus-plugin-ledger-connector-xdai/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
index 43bfbdc710..b0b741c795 100644
--- a/packages/cactus-plugin-ledger-connector-xdai/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
+++ b/packages/cactus-plugin-ledger-connector-xdai/src/main/typescript/prometheus-exporter/prometheus-exporter.ts
@@ -1,7 +1,8 @@
-import promClient from "prom-client";
+import promClient, { Registry } from "prom-client";
 import { Transactions } from "./response.type";
 import { collectMetrics } from "./data-fetcher";
 import { K_CACTUS_XDAI_TOTAL_TX_COUNT } from "./metrics";
+import { totalTxCount } from "./metrics";
 
 export interface IPrometheusExporterOptions {
   pollingIntervalInMin?: number;
@@ -10,12 +11,14 @@ export interface IPrometheusExporterOptions {
 export class PrometheusExporter {
   public readonly metricsPollingIntervalInMin: number;
   public readonly transactions: Transactions = { counter: 0 };
+  public readonly registry: Registry;
 
   constructor(
     public readonly prometheusExporterOptions: IPrometheusExporterOptions,
   ) {
     this.metricsPollingIntervalInMin =
       prometheusExporterOptions.pollingIntervalInMin || 1;
+    this.registry = new Registry();
   }
 
   public addCurrentTransaction(): void {
@@ -23,15 +26,14 @@ export class PrometheusExporter {
   }
 
   public async getPrometheusMetrics(): Promise<string> {
-    const result = await promClient.register.getSingleMetricAsString(
+    const result = await this.registry.getSingleMetricAsString(
       K_CACTUS_XDAI_TOTAL_TX_COUNT,
     );
     return result;
   }
 
   public startMetricsCollection(): void {
-    const Registry = promClient.Registry;
-    const register = new Registry();
-    promClient.collectDefaultMetrics({ register });
+    this.registry.registerMetric(totalTxCount);
+    promClient.collectDefaultMetrics({ register: this.registry });
   }
 }