diff --git a/packages/string-templates/src/index.ts b/packages/string-templates/src/index.ts
index 4a24328265..8d5fe4c16d 100644
--- a/packages/string-templates/src/index.ts
+++ b/packages/string-templates/src/index.ts
@@ -65,6 +65,7 @@ function createTemplate(
   context?: object
 ) {
   opts = { ...defaultOpts, ...opts }
+  const helpersEnabled = !opts?.noHelpers
 
   // Finalising adds a helper, can't do this with no helpers
   const key = `${string}-${JSON.stringify(opts)}`
@@ -74,7 +75,7 @@ function createTemplate(
     return templateCache[key]
   }
 
-  const overlappingHelpers = !opts?.noHelpers
+  const overlappingHelpers = helpersEnabled
     ? findOverlappingHelpers(context)
     : []
 
@@ -83,9 +84,9 @@ function createTemplate(
     disabledHelpers: overlappingHelpers,
   })
 
-  if (context && !opts?.noHelpers) {
+  if (context && helpersEnabled) {
     if (overlappingHelpers.length > 0) {
-      for (let block of findHBSBlocks(string)) {
+      for (const block of findHBSBlocks(string)) {
         string = string.replace(
           block,
           prefixStrings(block, overlappingHelpers, "./")
diff --git a/packages/string-templates/src/processors/postprocessor.ts b/packages/string-templates/src/processors/postprocessor.ts
index b8d99682b1..6ddc0e67cd 100644
--- a/packages/string-templates/src/processors/postprocessor.ts
+++ b/packages/string-templates/src/processors/postprocessor.ts
@@ -1,19 +1,21 @@
 import { LITERAL_MARKER } from "../helpers/constants"
 
-export const PostProcessorNames = {
-  CONVERT_LITERALS: "convert-literals",
+export enum PostProcessorNames {
+  CONVERT_LITERALS = "convert-literals",
 }
 
-class Postprocessor {
-  name: string
-  private fn: any
+type PostprocessorFn = (statement: string) => string
 
-  constructor(name: string, fn: any) {
+class Postprocessor {
+  name: PostProcessorNames
+  private readonly fn: PostprocessorFn
+
+  constructor(name: PostProcessorNames, fn: PostprocessorFn) {
     this.name = name
     this.fn = fn
   }
 
-  process(statement: any) {
+  process(statement: string) {
     return this.fn(statement)
   }
 }
diff --git a/packages/string-templates/src/processors/preprocessor.ts b/packages/string-templates/src/processors/preprocessor.ts
index 95a4d5500d..97e5c56fcc 100644
--- a/packages/string-templates/src/processors/preprocessor.ts
+++ b/packages/string-templates/src/processors/preprocessor.ts
@@ -1,25 +1,28 @@
 import { HelperNames } from "../helpers"
 import { swapStrings, isAlphaNumeric } from "../utilities"
+import { ProcessOptions } from "../types"
 
 const FUNCTION_CASES = ["#", "else", "/"]
 
-export const PreprocessorNames = {
-  SWAP_TO_DOT: "swap-to-dot-notation",
-  FIX_FUNCTIONS: "fix-functions",
-  FINALISE: "finalise",
-  NORMALIZE_SPACES: "normalize-spaces",
+export enum PreprocessorNames {
+  SWAP_TO_DOT = "swap-to-dot-notation",
+  FIX_FUNCTIONS = "fix-functions",
+  FINALISE = "finalise",
+  NORMALIZE_SPACES = "normalize-spaces",
 }
 
+type PreprocessorFn = (statement: string, opts?: ProcessOptions) => string
+
 class Preprocessor {
   name: string
-  private fn: any
+  private readonly fn: PreprocessorFn
 
-  constructor(name: string, fn: any) {
+  constructor(name: PreprocessorNames, fn: PreprocessorFn) {
     this.name = name
     this.fn = fn
   }
 
-  process(fullString: string, statement: string, opts: Object) {
+  process(fullString: string, statement: string, opts: ProcessOptions) {
     const output = this.fn(statement, opts)
     const idx = fullString.indexOf(statement)
     return swapStrings(fullString, idx, statement.length, output)
@@ -56,11 +59,9 @@ export const processors = [
   }),
   new Preprocessor(
     PreprocessorNames.FINALISE,
-    (
-      statement: string,
-      opts: { noHelpers: any; disabledHelpers?: string[] }
-    ) => {
-      const noHelpers = opts && opts.noHelpers
+    (statement: string, opts?: ProcessOptions) => {
+      const noHelpers = opts?.noHelpers
+      const helpersEnabled = !noHelpers
       let insideStatement = statement.slice(2, statement.length - 2)
       if (insideStatement.charAt(0) === " ") {
         insideStatement = insideStatement.slice(1)
@@ -77,8 +78,8 @@ export const processors = [
       }
       const testHelper = possibleHelper.trim().toLowerCase()
       if (
-        !noHelpers &&
-        !opts.disabledHelpers?.includes(testHelper) &&
+        helpersEnabled &&
+        !opts?.disabledHelpers?.includes(testHelper) &&
         HelperNames().some(option => testHelper === option.toLowerCase())
       ) {
         insideStatement = `(${insideStatement})`
diff --git a/packages/string-templates/test/helpers.spec.ts b/packages/string-templates/test/helpers.spec.ts
index 566be2b02b..12de4f1c29 100644
--- a/packages/string-templates/test/helpers.spec.ts
+++ b/packages/string-templates/test/helpers.spec.ts
@@ -505,4 +505,15 @@ describe("helper overlap", () => {
     })
     expect(output).toEqual(["a", "b"])
   })
+
+  it("should work as expected when no helpers are set", async () => {
+    const output = await processString(
+      "{{ sum }}",
+      {
+        sum: "a",
+      },
+      { noHelpers: true }
+    )
+    expect(output).toEqual("a")
+  })
 })