diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 3a8a8d2..7596467 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -18,7 +18,7 @@ jobs:
           - '3.8'
           - '3.9'
           - '3.10'
-        os: [ ubuntu-latest ]
+        os: [ ubuntu-20.04 ]
     env:
       OS: ${{ matrix.os }}
       PYTHON_VERSION: ${{ matrix.python-version }}
@@ -60,7 +60,7 @@ jobs:
           env_vars: OS,PYTHON_VERSION
 
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         python-version:
@@ -125,7 +125,7 @@ jobs:
 
   compat:
     name: Public API compatibility
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2
diff --git a/.github/workflows/tag.yml b/.github/workflows/tag.yml
index ba9944e..b7f6d04 100644
--- a/.github/workflows/tag.yml
+++ b/.github/workflows/tag.yml
@@ -8,7 +8,7 @@ on:
   
 jobs:
   tag:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2
diff --git a/dev-requirements-py3.txt b/dev-requirements-py3.txt
index 50fa8db..1d86d4d 100644
--- a/dev-requirements-py3.txt
+++ b/dev-requirements-py3.txt
@@ -1,2 +1,13 @@
 -r ./dev-requirements.txt
 prospector[with_pyroma]
+
+# More recent versions of these linters introduce rules that make it fail.
+# Pin these versions to keep the ruleset fixed.
+dodgy==0.2.1
+flake8==4.0.1
+flake8-polyfill==1.0.2
+mccabe==0.6.1
+prospector==1.7.7
+pycodestyle==2.8.0
+pyflakes==2.4.0
+pylint==2.13.9