diff --git a/cli/Dockerfile b/cli/Dockerfile
index 18755094..fcc071b7 100644
--- a/cli/Dockerfile
+++ b/cli/Dockerfile
@@ -10,7 +10,7 @@ FROM eclipse-temurin:17.0.8_7-jre
 
 LABEL org.opencontainers.image.source="https://github.com/zeldigas/text2confl"
 
-ARG PLANTUML="1.2023.11"
+ARG PLANTUML="1.2023.12"
 
 ADD https://github.com/plantuml/plantuml/releases/download/v$PLANTUML/plantuml.jar /usr/local/bin/plantuml.jar
 ADD scripts/plantuml /usr/local/bin/plantuml