diff --git a/resources/com/google/gerrit/server/mime/mime-types.properties b/resources/com/google/gerrit/server/mime/mime-types.properties
index 6ab682c..fd2280c 100644
--- a/resources/com/google/gerrit/server/mime/mime-types.properties
+++ b/resources/com/google/gerrit/server/mime/mime-types.properties
@@ -116,6 +116,7 @@
 jsx = text/jsx
 jsp = application/x-jsp
 kt = text/x-kotlin
+kts = text/x-kotlin
 less = text/x-less
 lhs = text/x-literate-haskell
 lisp = text/x-common-lisp