diff --git a/packages/sitecore-jss-dev-tools/src/disconnected-server/create-default-disconnected-server.ts b/packages/sitecore-jss-dev-tools/src/disconnected-server/create-default-disconnected-server.ts
index cc03bb0306..1d5598668f 100644
--- a/packages/sitecore-jss-dev-tools/src/disconnected-server/create-default-disconnected-server.ts
+++ b/packages/sitecore-jss-dev-tools/src/disconnected-server/create-default-disconnected-server.ts
@@ -32,7 +32,7 @@ export interface DisconnectedServerOptions {
   /**
    * Module to require before starting the disconnected server (i.e. a transpiler, or a config script that loads one)
    */
-  requireArg?: string;
+  requireArg?: string | null;
 
   /**
    * Express-like server instance to attach to. Defaults to a new Express instance if not passed.
diff --git a/packages/sitecore-jss-dev-tools/src/manifest-manager.ts b/packages/sitecore-jss-dev-tools/src/manifest-manager.ts
index bd1ae251f8..ca6606db56 100644
--- a/packages/sitecore-jss-dev-tools/src/manifest-manager.ts
+++ b/packages/sitecore-jss-dev-tools/src/manifest-manager.ts
@@ -16,7 +16,7 @@ export interface ManifestManagerOptions {
   rootPath?: string;
   sourceFiles?: string[];
   watchOnlySourceFiles?: string[];
-  requireArg?: string;
+  requireArg?: string | null;
   outputPath?: string;
   pipelinePatchFiles?: string[];
   appName?: string;
diff --git a/samples/nextjs/scripts/disconnected-mode-proxy.ts b/samples/nextjs/scripts/disconnected-mode-proxy.ts
index 3a2a654e51..31c9876797 100644
--- a/samples/nextjs/scripts/disconnected-mode-proxy.ts
+++ b/samples/nextjs/scripts/disconnected-mode-proxy.ts
@@ -20,7 +20,7 @@ const serverOptions = {
   appRoot: path.join(__dirname, '..'),
   appName: config.appName,
   // Prevent require of ./sitecore/definitions/config.js, because ts-node is running
-  requireArg: '',
+  requireArg: null,
   watchPaths: ['./data'],
   language: config.language,
   port: Number(process.env.PROXY_PORT) || 3042,