diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 86335aaecc..bcb3dc2378 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -309,7 +309,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ windows-latest, ubuntu-18.04 ]
+        os: [ windows-latest, ubuntu-20.04 ]
         python-version: [ 3.8 ]
       fail-fast: false
 
diff --git a/.github/workflows/matrix.py b/.github/workflows/matrix.py
index 268eca5cb4..79d52b2475 100644
--- a/.github/workflows/matrix.py
+++ b/.github/workflows/matrix.py
@@ -26,7 +26,7 @@
 #   dynamically linked by pyinstaller.
 #   https://pyinstaller.readthedocs.io/en/stable/usage.html#making-gnu-linux-apps-forward-compatible
 os_release_list = [
-    'ubuntu-18.04',
+    'ubuntu-20.04',
     'windows-latest',
     'macos-latest',
 ]