diff --git a/js/bootstrap-fileupload.js b/js/bootstrap-fileupload.js
index 64f66f6b..97a6da5b 100644
--- a/js/bootstrap-fileupload.js
+++ b/js/bootstrap-fileupload.js
@@ -78,7 +78,7 @@
       this.$hidden.attr('name', '')
       this.$input.attr('name', this.name)
 
-      if (this.type === "image" && this.$preview.length > 0 && (typeof file.type !== "undefined" ? file.type.match('image.*') : file.name.match('\\.(gif|png|jpe?g)$')) && typeof FileReader !== "undefined") {
+      if (this.type === "image" && this.$preview.length > 0 && (typeof file.type !== "undefined" ? file.type.match('image.*') : file.name.match(/\.(gif|png|jpe?g)$/i)) && typeof FileReader !== "undefined") {
         var reader = new FileReader()
         var preview = this.$preview
         var element = this.$element