diff --git a/client/less/code-mirror.less b/client/less/code-mirror.less
index 6e60833e48..79b8787874 100644
--- a/client/less/code-mirror.less
+++ b/client/less/code-mirror.less
@@ -31,3 +31,7 @@
   height: 100%;
   width: 100%;
 }
+
+.CodeMirror-lint-tooltip {
+  z-index: 9999;
+}
\ No newline at end of file