diff --git a/app/javascript/submission_form/dropzone.vue b/app/javascript/submission_form/dropzone.vue
index 19285c4e..fafcd4ed 100644
--- a/app/javascript/submission_form/dropzone.vue
+++ b/app/javascript/submission_form/dropzone.vue
@@ -128,7 +128,7 @@ export default {
               }
             })
           } else {
-            if (file.type === 'image/bmp') {
+            if (file.type === 'image/bmp' || file.type === 'image/vnd.microsoft.icon') {
               file = await this.convertBmpToPng(file)
             }