diff --git a/src/utils/__tests__/getMimeTypesUIKitAccepts.spec.ts b/src/utils/__tests__/getMimeTypesUIKitAccepts.spec.ts
index da89e6a78..9c801a089 100644
--- a/src/utils/__tests__/getMimeTypesUIKitAccepts.spec.ts
+++ b/src/utils/__tests__/getMimeTypesUIKitAccepts.spec.ts
@@ -22,4 +22,9 @@ describe('Global-utils/getMimeTypesUIKitAccepts', () => {
       });
     expect(getMimeTypesUIKitAccepts([])).toBe(allMimeTypes.join());
   });
+  it('when given mime types, should return mime types string.', () => {
+    const accept = getMimeTypesUIKitAccepts(['image/png', 'image/heic']);
+    const expected = 'image/png,image/heic';
+    expect(accept).toBe(expected);
+  });
 });
diff --git a/src/utils/index.ts b/src/utils/index.ts
index bfa3cd6b5..aa1aef9d7 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -96,32 +96,35 @@ export const SUPPORTED_MIMES = {
   ],
 };
 
-export const getMimeTypesUIKitAccepts = (acceptableMimeTypes?: Array<string>): string => {
-  const { IMAGE, VIDEO, AUDIO } = SUPPORTED_MIMES;
-
+export const getMimeTypesUIKitAccepts = (acceptableMimeTypes?: string[]): string => {
   if (Array.isArray(acceptableMimeTypes) && acceptableMimeTypes.length > 0) {
-    return (
-      acceptableMimeTypes
-        .reduce((accumulator: Array<string>, acceptableMimeType: string): Array<string> => (
-          accumulator.concat(
-            match(acceptableMimeType)
-              .with('image', () => IMAGE)
-              .with('video', () => VIDEO)
-              .with('audio', () => AUDIO)
-              .otherwise(() => []),
-          )
-        ), [])
-        .join()
-    );
-  }
-  return (
-    Object.values(SUPPORTED_MIMES)
-      .reduce((accumulator: Array<string>, mimeTypes: Array<string>) => (
-        accumulator.concat(mimeTypes)
-      ), [])
-      .join()
-  );
-  // concat() is fater than flat()
+    return acceptableMimeTypes
+      .reduce((prev, curr) => {
+        switch (curr) {
+          case 'image': {
+            prev.push(...SUPPORTED_MIMES.IMAGE);
+            break;
+          }
+          case 'video': {
+            prev.push(...SUPPORTED_MIMES.VIDEO);
+            break;
+          }
+          case 'audio': {
+            prev.push(...SUPPORTED_MIMES.AUDIO);
+            break;
+          }
+          default: {
+            prev.push(curr);
+            break;
+          }
+        }
+
+        return prev;
+      }, [] as string[])
+      .join();
+  }
+
+  return Object.values(SUPPORTED_MIMES).reduce((prev, curr) => (prev.concat(curr)), []).join();
 };
 
 /* eslint-disable no-redeclare */