diff --git a/src/renderer/src/pages/home/Messages/MessageEditor.tsx b/src/renderer/src/pages/home/Messages/MessageEditor.tsx
index 482e8031d9..31e03b5641 100644
--- a/src/renderer/src/pages/home/Messages/MessageEditor.tsx
+++ b/src/renderer/src/pages/home/Messages/MessageEditor.tsx
@@ -185,7 +185,7 @@ const MessageBlockEditor: FC<Props> = ({ message, topicId, onSave, onResend, onC
     if (files) {
       let supportedFiles = 0
       files.forEach((file) => {
-        if (extensions.includes(file.ext)) {
+        if (extensions.includes(file.ext.toLowerCase())) {
           setFiles((prevFiles) => [...prevFiles, file])
           supportedFiles++
         }