diff --git a/src/lib/picker.ts b/src/lib/picker.ts
index 42960731..83e75e20 100644
--- a/src/lib/picker.ts
+++ b/src/lib/picker.ts
@@ -388,6 +388,15 @@ export interface PickerOptions {
    * ```
    */
   acceptFn?: (PickerFileMetadata, PickerAcceptFnOptions) => Promise<string>;
+
+  /**
+   *  When true, file's format are validated only by extension instead of MIME type.
+   *  Note, that in accept array only exact file extensions are going to be validated -
+   *  MIME types groups such as ["image/jpeg"] will be omitted.
+   *  Default false.
+   */
+  validateFileExtensionOnly?: boolean;
+
   /**
    * Prevent modal close on upload failure and allow users to retry.
    */
diff --git a/src/schema/picker.schema.ts b/src/schema/picker.schema.ts
index d37225c8..9d7e33fd 100644
--- a/src/schema/picker.schema.ts
+++ b/src/schema/picker.schema.ts
@@ -47,6 +47,9 @@ export const PickerParamsSchema = {
     acceptFn: {
       format: 'callback',
     },
+    validateFileExtensionOnly :{
+      type: 'boolean'
+    },
     fromSources: {
       type: 'array',
       items: [