diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index dcab248..0bc067c 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -20,7 +20,7 @@ env:
 
 jobs:
   rspec:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
       matrix:
diff --git a/.github/workflows/mend_ruby.yaml b/.github/workflows/mend_ruby.yaml
index e44dfdc..d9ee74e 100644
--- a/.github/workflows/mend_ruby.yaml
+++ b/.github/workflows/mend_ruby.yaml
@@ -12,7 +12,7 @@ env:
 
 jobs:
   scan:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout repo
         uses: actions/checkout@v4
diff --git a/Gemfile.lock b/Gemfile.lock
index 3b529ba..dc22990 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -51,7 +51,7 @@ GEM
       base64
       nkf
       rexml
-    activesupport (8.0.2)
+    activesupport (8.0.5.2)
       base64
       benchmark (>= 0.3)
       bigdecimal