diff --git a/package.json b/package.json
index c55bd234..85d6bcbb 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "ngx-uploader",
   "description": "Angular File Uploader",
-  "version": "2.2.4",
+  "version": "2.2.5",
   "license": "MIT",
   "main": "bundle/ngx-uploader.umd.js",
   "module": "ngx-uploader.js",
diff --git a/src/directives/ng-file-drop.ts b/src/directives/ng-file-drop.ts
index 37912aed..7d0b8060 100644
--- a/src/directives/ng-file-drop.ts
+++ b/src/directives/ng-file-drop.ts
@@ -100,7 +100,7 @@ export class NgFileDropDirective implements OnChanges, OnInit {
         }
 
         let ext = f.name.split('.').pop();
-        if (ext && allowedExtensions.indexOf(ext) !== -1 ) {
+        if (ext && allowedExtensions.indexOf(ext.toLowerCase()) !== -1 ) {
           return true;
         }