diff --git a/atom/common/platform_util_mac.mm b/atom/common/platform_util_mac.mm
index 2f9e2b764236..dcf622feb5cd 100644
--- a/atom/common/platform_util_mac.mm
+++ b/atom/common/platform_util_mac.mm
@@ -121,7 +121,8 @@ void OpenItem(const base::FilePath& full_path) {
 bool OpenExternal(const GURL& url) {
   DCHECK([NSThread isMainThread]);
   NSString* url_string = base::SysUTF8ToNSString(url.spec());
-  NSURL* ns_url = [NSURL URLWithString:url_string];
+  NSString* url_escaped_string = [url_string stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
+  NSURL* ns_url = [NSURL URLWithString:url_escaped_string];
   if (!ns_url) {
     return false;
   }