diff --git a/grml_build/Dockerfile b/grml_build/Dockerfile
index 1e89e4a..bface98 100755
--- a/grml_build/Dockerfile
+++ b/grml_build/Dockerfile
@@ -6,7 +6,7 @@ FROM docker.mgm.sipwise.com/sipwise-trixie:latest
 # is updated with the current date. It will force refresh of all
 # of the base images and things like `apt-get update` won't be using
 # old cached versions when the Dockerfile is built.
-ENV REFRESHED_AT=2026-04-29
+ENV REFRESHED_AT=2026-06-29
 
 # tools for building and testing
 RUN apt-get update && apt-get install --assume-yes --no-install-recommends \