diff --git a/.github/workflows/mkosi.yml b/.github/workflows/mkosi.yml
index e4b2d91ba6..966e364f71 100644
--- a/.github/workflows/mkosi.yml
+++ b/.github/workflows/mkosi.yml
@@ -40,7 +40,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
-    - uses: systemd/mkosi@01ea953fd2af738f974b228991c768c12b50db95
+    - uses: systemd/mkosi@30288805db1a953ea31045933adb93194f91e3da
 
     - name: Install
       run: sudo apt-get update && sudo apt-get install --no-install-recommends python3-pexpect python3-jinja2
diff --git a/mkosi.default.d/debian/10-mkosi.debian b/mkosi.default.d/debian/10-mkosi.debian
index 2be71f3c7f..d35b1d72a6 100644
--- a/mkosi.default.d/debian/10-mkosi.debian
+++ b/mkosi.default.d/debian/10-mkosi.debian
@@ -5,7 +5,7 @@
 
 [Distribution]
 Distribution=debian
-Release=unstable
+Release=testing
 
 [Packages]
 BuildPackages=