diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e5f0b1f..0adbaff 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-20.04, ubuntu-18.04, macos-latest, windows-latest ]
+        os: [ ubuntu-20.04, macos-latest, windows-latest ]
         build: [ cli, cli-mt, cli-ansi, cli-ansi-mt, gui, gui-mt ]
         include:
           - build: cli
diff --git a/.github/workflows/package.yml b/.github/workflows/package.yml
index 667776b..ed5856d 100644
--- a/.github/workflows/package.yml
+++ b/.github/workflows/package.yml
@@ -9,7 +9,7 @@ jobs:
   ubuntu:
     strategy:
       matrix:
-        os: [ ubuntu-18.04, ubuntu-20.04 ]
+        os: [ ubuntu-20.04 ]
         component: [ cli, gui ]
         include:
           - component: cli