diff --git a/html/buildSrc/gradle.properties b/html/buildSrc/gradle.properties
index bb474a25d4..4a14484b30 100644
--- a/html/buildSrc/gradle.properties
+++ b/html/buildSrc/gradle.properties
@@ -1 +1 @@
-kotlin.version=1.9.10
+kotlin.version=1.8.21