diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index ad88c7e..575cd42 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: [ 3.9, '3.10', '3.11', '3.12', '3.13' ]
-        os: [ ubuntu-latest ]
+        os: [ ubuntu-22.04 ]
 
     steps:
       - name: Checkout repository
diff --git a/requirements.txt b/requirements.txt
index dcdb2dd..1a742c0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-pytest-cov==6.0.0
+pytest-cov==6.1.1
 pytest-order==1.3.0