diff --git a/docker/Dockerfile.gcc11 b/docker/Dockerfile.gcc11
index b4ca19131..a452f5804 100644
--- a/docker/Dockerfile.gcc11
+++ b/docker/Dockerfile.gcc11
@@ -27,7 +27,7 @@ RUN cmake -D$target=ON  -DBUILD_CMD_LINE_TOOLS=ON -DBUILD_DEMONSTRATION=OFF .. &
 # RELEASE stage
 #FROM alpine:latest as release    # hitting a segfault during startup of some playground programs
 #FROM debian:buster-slim as release
-FROM ubuntu:lunar-20231004 as release
+FROM ubuntu:mantic-20231011 as release
 LABEL Theodore Omtzigt
 
 #RUN apk add --no-cache libc6-compat libstdc++ cmake make bash gawk sed grep bc coreutils