diff --git a/.github/workflows/boot.yml b/.github/workflows/boot.yml
index e5ee1cb3..1d71ab69 100644
--- a/.github/workflows/boot.yml
+++ b/.github/workflows/boot.yml
@@ -2,7 +2,7 @@ name: spring-boot-compatibility
 on: [push]
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         spring-boot: [ '2.5.15', '2.6.15', '2.7.18', '3.0.13', '3.1.10', '3.2.4' ]
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cd09e619..b3858955 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,7 +2,7 @@ name: build
 on: [push,pull_request]
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         java: [ '11', '17', '21' ]
diff --git a/.github/workflows/pr-lint.yml b/.github/workflows/pr-lint.yml
index 2d724efc..5b712b36 100644
--- a/.github/workflows/pr-lint.yml
+++ b/.github/workflows/pr-lint.yml
@@ -10,7 +10,7 @@ on:
 jobs:
   main:
     name: Validate PR title
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: amannn/action-semantic-pull-request@v5
         env:
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index d09ad74d..f56e7c11 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -2,7 +2,7 @@ name: pull-request-check
 on: [pull_request]
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         java: [ '17' ]
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index dac7397b..656f07bb 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,7 +10,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
       - name: Checkout