diff --git a/src/kemal/ext/response.cr b/src/kemal/ext/response.cr
index 6fd4c01..103046f 100644
--- a/src/kemal/ext/response.cr
+++ b/src/kemal/ext/response.cr
@@ -1,3 +1,7 @@
+# This override collides with the new stdlib of Crystal 1.3
+# See https://github.com/kemalcr/kemal/issues/627 for more details
+{{ skip_file if compare_versions(Crystal::VERSION, "1.3.0") >= 0 }}
+
 class HTTP::Server::Response
   class Output
     def close