diff --git a/builder-tcltk/debian/Dockerfile b/builder-tcltk/debian/Dockerfile
index bc28408..7964dcb 100644
--- a/builder-tcltk/debian/Dockerfile
+++ b/builder-tcltk/debian/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:11.6-slim
+FROM debian:12.5-slim
 RUN apt-get update \
     && apt-get install -y locales tcl tk libtcl libtk tcl-dev tk-dev libterm-readline-perl-perl git debhelper \
     && rm -rf /var/lib/apt/lists/* \