diff --git a/Dockerfile.base b/Dockerfile.base
index 842dc6e..741c651 100644
--- a/Dockerfile.base
+++ b/Dockerfile.base
@@ -1,4 +1,4 @@
-FROM tomcat:9.0.85-jre11
+FROM tomcat:9.0.88-jdk21
 
 ENV GUAC_VER=1.5.5 \
     GUACAMOLE_HOME=/app/guacamole \