diff --git a/package.json b/package.json
index c858e51..8c847aa 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "typescript-plugin-css-modules",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "main": "dist/index.js",
   "author": "Brody McKee <mrmckeb@hotmail.com>",
   "license": "MIT",
diff --git a/src/helpers/__tests__/__snapshots__/getDtsSnapshot.test.ts.snap b/src/helpers/__tests__/__snapshots__/getDtsSnapshot.test.ts.snap
index b52333d..164ff3c 100644
--- a/src/helpers/__tests__/__snapshots__/getDtsSnapshot.test.ts.snap
+++ b/src/helpers/__tests__/__snapshots__/getDtsSnapshot.test.ts.snap
@@ -932,25 +932,25 @@ exports[`utils / cssSnapshots with noUncheckedIndexedAccess enabled should retur
   'appLogo'?: string;
 };
 export default classes;
-export let localClassInsideGlobal?: string;
-export let localClass?: string;
-export let localClass2?: string;
-export let localClassInsideLocal?: string;
-export let reservedWords?: string;
-export let nestedClassParent?: string;
-export let childClass?: string;
-export let nestedClassParentExtended?: string;
-export let section1?: string;
-export let section2?: string;
-export let section3?: string;
-export let section4?: string;
-export let section5?: string;
-export let section6?: string;
-export let section7?: string;
-export let section8?: string;
-export let section9?: string;
-export let classWithMixin?: string;
-export let appLogo?: string;
-export let appLogo?: string;
+export let localClassInsideGlobal: string | undefined;
+export let localClass: string | undefined;
+export let localClass2: string | undefined;
+export let localClassInsideLocal: string | undefined;
+export let reservedWords: string | undefined;
+export let nestedClassParent: string | undefined;
+export let childClass: string | undefined;
+export let nestedClassParentExtended: string | undefined;
+export let section1: string | undefined;
+export let section2: string | undefined;
+export let section3: string | undefined;
+export let section4: string | undefined;
+export let section5: string | undefined;
+export let section6: string | undefined;
+export let section7: string | undefined;
+export let section8: string | undefined;
+export let section9: string | undefined;
+export let classWithMixin: string | undefined;
+export let appLogo: string | undefined;
+export let appLogo: string | undefined;
 "
 `;
diff --git a/src/helpers/__tests__/getDtsSnapshot.test.ts b/src/helpers/__tests__/getDtsSnapshot.test.ts
index bfb60f1..ea19b24 100644
--- a/src/helpers/__tests__/getDtsSnapshot.test.ts
+++ b/src/helpers/__tests__/getDtsSnapshot.test.ts
@@ -286,7 +286,6 @@ describe('utils / cssSnapshots', () => {
         logger,
         options,
       });
-      expect(dts).not.toMatch(/\w'?: string/);
       expect(dts).toMatchSnapshot();
     });
   });
diff --git a/src/helpers/createDtsExports.ts b/src/helpers/createDtsExports.ts
index 7533e0e..02459f9 100644
--- a/src/helpers/createDtsExports.ts
+++ b/src/helpers/createDtsExports.ts
@@ -31,7 +31,9 @@ export const createDtsExports = ({
   const classnameToProperty = (classname: string) =>
     `'${classname}'${possiblyUndefined ? '?' : ''}: string;`;
   const classnameToNamedExport = (classname: string) =>
-    `export let ${classname}${possiblyUndefined ? '?' : ''}: string;`;
+    `export let ${classname}: string${
+      possiblyUndefined ? ' | undefined' : ''
+    };`;
 
   const processedClasses = Object.keys(classes)
     .map(transformClasses(options.classnameTransform))