diff --git a/Dockerfile.base b/Dockerfile.base
index 741c651..32cc17e 100644
--- a/Dockerfile.base
+++ b/Dockerfile.base
@@ -1,4 +1,4 @@
-FROM tomcat:9.0.88-jdk21
+FROM tomcat:9.0.88-jdk17
 
 ENV GUAC_VER=1.5.5 \
     GUACAMOLE_HOME=/app/guacamole \