diff --git a/.forgejo/workflows/impl.yaml b/.forgejo/workflows/impl.yaml
index 4af15af..529aefe 100644
--- a/.forgejo/workflows/impl.yaml
+++ b/.forgejo/workflows/impl.yaml
@@ -3,7 +3,7 @@ jobs:
   build-hamnet70:
     runs-on: docker
     container:
-      image: git.tkolb.de/amateurfunk/hamnet70/impl_buildenv:1.0
+      image: git.tkolb.de/amateurfunk/hamnet70/impl_buildenv:1.1
     steps:
       - uses: actions/checkout@v4
       - run: cd impl && cp src/config.h.template src/config.h && sed -i 's/undefined/"TESTCALL"/' src/config.h