diff --git a/Dockerfile b/Dockerfile
index 53e8c0a..70551f9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG LANGUAGETOOL_VERSION=6.2
+ARG LANGUAGETOOL_VERSION=6.3-branch
 
 FROM debian:bookworm as build