diff --git a/packages/string-templates/src/conversion/index.ts b/packages/string-templates/src/conversion/index.ts
index d69576e940..faf65b6085 100644
--- a/packages/string-templates/src/conversion/index.ts
+++ b/packages/string-templates/src/conversion/index.ts
@@ -63,7 +63,7 @@ function buildList(parts: any[], value: any) {
 }
 
 function splitBySpace(layer: string) {
-  const parts = []
+  const parts: string[] = []
   let started = null,
     endChar = null,
     last = 0
diff --git a/packages/string-templates/src/helpers/date.ts b/packages/string-templates/src/helpers/date.ts
index efcf516dfb..5b85aeedd4 100644
--- a/packages/string-templates/src/helpers/date.ts
+++ b/packages/string-templates/src/helpers/date.ts
@@ -27,11 +27,11 @@ dayjs.extend(dayjsTimezonePlugin)
  * https://github.com/helpers/helper-date
  */
 
-function isOptions(val) {
+function isOptions(val: any) {
   return typeof val === "object" && typeof val.hash === "object"
 }
 
-function isApp(thisArg) {
+function isApp(thisArg: any) {
   return (
     typeof thisArg === "object" &&
     typeof thisArg.options === "object" &&
@@ -39,7 +39,7 @@ function isApp(thisArg) {
   )
 }
 
-function getContext(thisArg, locals, options) {
+function getContext(thisArg: any, locals: any, options: any) {
   if (isOptions(thisArg)) {
     return getContext({}, locals, thisArg)
   }
@@ -68,7 +68,7 @@ function getContext(thisArg, locals, options) {
   return context
 }
 
-function initialConfig(str, pattern, options?) {
+function initialConfig(str: any, pattern: any, options?: any) {
   if (isOptions(pattern)) {
     options = pattern
     pattern = null
@@ -82,7 +82,7 @@ function initialConfig(str, pattern, options?) {
   return { str, pattern, options }
 }
 
-function setLocale(str, pattern, options?) {
+function setLocale(str: any, pattern: any, options?: any) {
   // if options is null then it'll get updated here
   const config = initialConfig(str, pattern, options)
   const defaults = { lang: "en", date: new Date(config.str) }
@@ -93,7 +93,7 @@ function setLocale(str, pattern, options?) {
   dayjs.locale(opts.lang || opts.language)
 }
 
-export const date = (str, pattern, options) => {
+export const date = (str: any, pattern: any, options: any) => {
   const config = initialConfig(str, pattern, options)
 
   // if no args are passed, return a formatted date
@@ -119,7 +119,7 @@ export const date = (str, pattern, options) => {
   return date.format(config.pattern)
 }
 
-export const duration = (str, pattern, format) => {
+export const duration = (str: any, pattern: any, format: any) => {
   const config = initialConfig(str, pattern)
 
   setLocale(config.str, config.pattern)
diff --git a/packages/string-templates/src/helpers/external.ts b/packages/string-templates/src/helpers/external.ts
index 8f0577a945..efb390ff8b 100644
--- a/packages/string-templates/src/helpers/external.ts
+++ b/packages/string-templates/src/helpers/external.ts
@@ -1,4 +1,4 @@
-import helpers from "@budibase/handlebars-helpers"
+const helpers = require("@budibase/handlebars-helpers")
 import { date, duration } from "./date"
 import { HelperFunctionBuiltin } from "./constants"
 
diff --git a/packages/string-templates/src/helpers/javascript.ts b/packages/string-templates/src/helpers/javascript.ts
index b75c9f5ac1..c3833cd9a0 100644
--- a/packages/string-templates/src/helpers/javascript.ts
+++ b/packages/string-templates/src/helpers/javascript.ts
@@ -1,20 +1,23 @@
 import { atob, isBackendService, isJSAllowed } from "../utilities"
-import cloneDeep from "lodash.clonedeep"
+import cloneDeep from "lodash/fp/clonedeep"
 import { LITERAL_MARKER } from "../helpers/constants"
 import { getJsHelperList } from "./list"
 
 // The method of executing JS scripts depends on the bundle being built.
 // This setter is used in the entrypoint (either index.js or index.mjs).
-let runJS
-export const setJSRunner = runner => (runJS = runner)
+let runJS: (js: string, context: any) => any
+export const setJSRunner = (runner: typeof runJS) => (runJS = runner)
 
-export const removeJSRunner = () => (runJS = undefined)
+export const removeJSRunner = () => {
+  runJS = undefined
+}
 
-let onErrorLog
-export const setOnErrorLog = delegate => (onErrorLog = delegate)
+let onErrorLog: (message: string) => void
+export const setOnErrorLog = (delegate: typeof onErrorLog) =>
+  (onErrorLog = delegate)
 
 // Helper utility to strip square brackets from a value
-const removeSquareBrackets = value => {
+const removeSquareBrackets = (value: string) => {
   if (!value || typeof value !== "string") {
     return value
   }
@@ -28,7 +31,7 @@ const removeSquareBrackets = value => {
 
 // Our context getter function provided to JS code as $.
 // Extracts a value from context.
-const getContextValue = (path, context) => {
+const getContextValue = (path: string, context: any) => {
   let data = context
   path.split(".").forEach(key => {
     if (data == null || typeof data !== "object") {
@@ -40,7 +43,7 @@ const getContextValue = (path, context) => {
 }
 
 // Evaluates JS code against a certain context
-export function processJS(handlebars, context) {
+export function processJS(handlebars: string, context: any) {
   if (!isJSAllowed() || (isBackendService() && !runJS)) {
     throw new Error("JS disabled in environment.")
   }
@@ -53,7 +56,7 @@ export function processJS(handlebars, context) {
     // We clone the context to avoid mutation in the binding affecting real
     // app context.
     const sandboxContext = {
-      $: path => getContextValue(path, cloneDeep(context)),
+      $: (path: string) => getContextValue(path, cloneDeep(context)),
       helpers: getJsHelperList(),
     }
 
diff --git a/packages/string-templates/src/helpers/list.ts b/packages/string-templates/src/helpers/list.ts
index 7b25216976..010dbe18f3 100644
--- a/packages/string-templates/src/helpers/list.ts
+++ b/packages/string-templates/src/helpers/list.ts
@@ -20,7 +20,7 @@ const addedHelpers = {
   duration: duration,
 }
 
-let helpers = undefined
+let helpers: Record<string, any> = undefined
 
 export function getJsHelperList() {
   if (helpers) {
@@ -31,11 +31,12 @@ export function getJsHelperList() {
   for (let collection of Object.values(getExternalCollections())) {
     for (let [key, func] of Object.entries(collection)) {
       // Handlebars injects the hbs options to the helpers by default. We are adding an empty {} as a last parameter to simulate it
-      helpers[key] = (...props) => func(...props, {})
+      helpers[key] = (...props: any) => func(...props, {})
     }
   }
-  for (let key of Object.keys(addedHelpers)) {
-    helpers[key] = addedHelpers[key]
+  helpers = {
+    ...helpers,
+    addedHelpers,
   }
 
   for (const toRemove of helpersToRemoveForJs) {
diff --git a/packages/string-templates/tsconfig.json b/packages/string-templates/tsconfig.json
index 2fa760d011..585c3bf747 100644
--- a/packages/string-templates/tsconfig.json
+++ b/packages/string-templates/tsconfig.json
@@ -4,8 +4,8 @@
     "declaration": true,
     "target": "es6",
     "moduleResolution": "node",
+    "noImplicitAny": true,
     "lib": ["dom"],
-    "allowJs": true,
     "outDir": "dist",
     "esModuleInterop": true,
     "types": ["node", "jest"],