diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 084ac2a..c2c556b 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -11,7 +11,7 @@ jobs:
   compile:
     strategy:
       matrix:
-        os: [ ubuntu-18.04, ubuntu-20.04, ubuntu-22.04, macos-latest, windows-latest ]
+        os: [ ubuntu-20.04, ubuntu-22.04, macos-latest, windows-latest ]
 
     name: ${{matrix.os}}
     runs-on: ${{matrix.os}}