diff --git a/.github/workflows/norms.yaml b/.github/workflows/norms.yaml
index d277d66..257f47a 100644
--- a/.github/workflows/norms.yaml
+++ b/.github/workflows/norms.yaml
@@ -3,7 +3,7 @@ on: [push]
 
 jobs:
   check_pynorms:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     name: Check coding norms with pycodestyle
 
     steps:
diff --git a/.github/workflows/unittests.yaml b/.github/workflows/unittests.yaml
index b3cc630..ff0030c 100644
--- a/.github/workflows/unittests.yaml
+++ b/.github/workflows/unittests.yaml
@@ -3,7 +3,7 @@ on: [push, pull_request]
 
 jobs:
   ctests:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     name: Run Unit Tests with ctest
 
     steps: