diff --git a/.github/workflows/git-release.yml b/.github/workflows/git-release.yml
index 6404b8d..d56d974 100644
--- a/.github/workflows/git-release.yml
+++ b/.github/workflows/git-release.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, ubuntu-20.04, ubuntu-18.04]
+        os: [ubuntu-22.04, ubuntu-20.04]
     steps:
       - name: Update lists
         run: |
diff --git a/README.md b/README.md
index 8db861c..90d04f6 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,6 @@ Cache PHP extensions in [GitHub Actions](https://github.com/features/actions "Gi
 |----------------------|------------------------------------|
 | Ubuntu 22.04         | `ubuntu-22.04`                     |
 | Ubuntu 20.04         | `ubuntu-latest` or `ubuntu-20.04`  |
-| Ubuntu 18.04         | `ubuntu-18.04`                     |
 | Windows Server 2022  | `windows-2022`                     |
 | Windows Server 2019  | `windows-latest` or `windows-2019` |
 | macOS Big Sur 12.x   | `macOS-12`                         |