diff --git a/deno_dist/browser.ts b/deno_dist/browser.ts
index bd9425a..efb2e48 100644
--- a/deno_dist/browser.ts
+++ b/deno_dist/browser.ts
@@ -6,6 +6,6 @@ export { templates } from "./containers.ts";
 export {
   config,
   config as defaultConfig,
-  getConfig,
   configure,
+  getConfig,
 } from "./config.ts";
diff --git a/deno_dist/config.ts b/deno_dist/config.ts
index 3ac6092..21a8296 100644
--- a/deno_dist/config.ts
+++ b/deno_dist/config.ts
@@ -170,8 +170,8 @@ function getConfig(override: PartialConfig, baseConfig?: EtaConfig): EtaConfig {
 
 /** Update Eta's base config */
 
-function configure(options: PartialConfig) {
+function configure(options: PartialConfig): Partial<EtaConfig> {
   return copyProps(config, options);
 }
 
-export { config, getConfig, configure };
+export { config, configure, getConfig };
diff --git a/deno_dist/err.ts b/deno_dist/err.ts
index 2be82af..377228e 100644
--- a/deno_dist/err.ts
+++ b/deno_dist/err.ts
@@ -36,7 +36,7 @@ EtaErr.prototype = Object.create(Error.prototype, {
  * Throws an EtaErr with a nicely formatted error and message showing where in the template the error occurred.
  */
 
-export function ParseErr(message: string, str: string, indx: number) {
+export function ParseErr(message: string, str: string, indx: number): void {
   var whitespace = str.slice(0, indx).split(/\n/);
 
   var lineNo = whitespace.length;
diff --git a/deno_dist/file-handlers.ts b/deno_dist/file-handlers.ts
index bd70c9a..6659c80 100644
--- a/deno_dist/file-handlers.ts
+++ b/deno_dist/file-handlers.ts
@@ -11,8 +11,8 @@ import { promiseImpl } from "./polyfills.ts";
 
 import type {
   EtaConfig,
-  PartialConfig,
   EtaConfigWithFilename,
+  PartialConfig,
 } from "./config.ts";
 import type { TemplateFunction } from "./compile.ts";
 
@@ -193,16 +193,20 @@ function renderFile(
   data: DataObj,
   config?: PartialConfig,
   cb?: CallbackFn,
-): any;
+): (Promise<string> | void);
 
-function renderFile(filename: string, data: DataObj, cb?: CallbackFn): any;
+function renderFile(
+  filename: string,
+  data: DataObj,
+  cb?: CallbackFn,
+): (Promise<string> | void);
 
 function renderFile(
   filename: string,
   data: DataObj,
   config?: PartialConfig,
   cb?: CallbackFn,
-) {
+): (Promise<string> | void) {
   /*
   Here we have some function overloading.
   Essentially, the first 2 arguments to renderFile should always be the filename and data
diff --git a/deno_dist/file-utils.ts b/deno_dist/file-utils.ts
index 2059a1c..eca8080 100644
--- a/deno_dist/file-utils.ts
+++ b/deno_dist/file-utils.ts
@@ -57,7 +57,7 @@ function getWholeFilePath(
  * @return absolute path to template
  */
 
-function getPath(path: string, options: EtaConfig) {
+function getPath(path: string, options: EtaConfig): string {
   var includePath: string | false = false;
   var views = options.views;
   var searchedPaths: Array<string> = [];
@@ -192,7 +192,7 @@ function getPath(path: string, options: EtaConfig) {
  * Reads a file synchronously
  */
 
-function readFile(filePath: string) {
+function readFile(filePath: string): string {
   try {
     return readFileSync(filePath).toString().replace(_BOM, ""); // TODO: is replacing BOM's necessary?
   } catch {
diff --git a/deno_dist/mod.ts b/deno_dist/mod.ts
index fde552f..4f41a05 100644
--- a/deno_dist/mod.ts
+++ b/deno_dist/mod.ts
@@ -21,6 +21,6 @@ export { templates } from "./containers.ts";
 export {
   config,
   config as defaultConfig,
-  getConfig,
   configure,
+  getConfig,
 } from "./config.ts";
diff --git a/deno_dist/storage.ts b/deno_dist/storage.ts
index 669436f..118298a 100644
--- a/deno_dist/storage.ts
+++ b/deno_dist/storage.ts
@@ -8,7 +8,7 @@ import { copyProps } from "./utils.ts";
  */
 class Cacher<T> {
   constructor(private cache: Record<string, T>) {}
-  define(key: string, val: T) {
+  define(key: string, val: T): void {
     this.cache[key] = val;
   }
   get(key: string): T {
@@ -17,13 +17,13 @@ class Cacher<T> {
     // TODO: create plugin to allow referencing helpers, filters with dot notation
     return this.cache[key];
   }
-  remove(key: string) {
+  remove(key: string): void {
     delete this.cache[key];
   }
-  reset() {
+  reset(): void {
     this.cache = {};
   }
-  load(cacheObj: Record<string, T>) {
+  load(cacheObj: Record<string, T>): void {
     copyProps(this.cache, cacheObj);
   }
 }
diff --git a/deno_dist/utils.ts b/deno_dist/utils.ts
index 42e8e4d..a773363 100644
--- a/deno_dist/utils.ts
+++ b/deno_dist/utils.ts
@@ -18,11 +18,11 @@ interface EscapeMap {
 
 /* END TYPES */
 
-export function hasOwnProp(obj: object, prop: string) {
+export function hasOwnProp(obj: object, prop: string): boolean {
   return Object.prototype.hasOwnProperty.call(obj, prop);
 }
 
-export function copyProps<T>(toObj: T, fromObj: T) {
+export function copyProps<T>(toObj: T, fromObj: T): T {
   for (var key in fromObj) {
     if (hasOwnProp((fromObj as unknown) as object, key)) {
       toObj[key] = fromObj[key];
@@ -113,7 +113,7 @@ function replaceChar(s: string): string {
  * @returns XML-escaped string
  */
 
-function XMLEscape(str: any) {
+function XMLEscape(str: any): string {
   // eslint-disable-line @typescript-eslint/no-explicit-any
   // To deal with XSS. Based on Escape implementations of Mustache.JS and Marko, then customized.
   var newStr = String(str);