diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index b721da739..5bfbe56ee 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -5,4 +5,4 @@ on:
 
 jobs:
   Lint:
-    uses: tskit-dev/.github/.github/workflows/lint.yml@main
+    uses: tskit-dev/.github/.github/workflows/lint.yml@v12
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4feaf922c..f72d24594 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -10,14 +10,14 @@ jobs:
 
   packaging:
     name: Python packaging
-    uses: tskit-dev/.github/.github/workflows/python-packaging.yml@v10
+    uses: tskit-dev/.github/.github/workflows/python-packaging.yml@v12
     with:
       additional-apt-packages: libgsl-dev
       cli-test-cmd: msp --help
 
   test-c:
     name: C tests
-    uses: tskit-dev/.github/.github/workflows/c-tests.yml@main
+    uses: tskit-dev/.github/.github/workflows/c-tests.yml@v12
     with:
       additional-apt-packages: libgsl-dev
       library-directory: lib
@@ -25,7 +25,7 @@ jobs:
 
   test-python-c:
     name: Python-C tests
-    uses: tskit-dev/.github/.github/workflows/python-c-tests.yml@main
+    uses: tskit-dev/.github/.github/workflows/python-c-tests.yml@v12
     with:
       additional-apt-packages: libgsl-dev
     secrets: inherit
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index ded34030c..90a9059e7 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   build-wheels:
-    uses: tskit-dev/.github/.github/workflows/build-wheels.yml@main
+    uses: tskit-dev/.github/.github/workflows/build-wheels.yml@v12
     # with:
     #   os-list: '["windows-2025"]' #, "ubuntu-24.04"]'