diff --git a/.gitea/workflows/ci.yaml b/.gitea/workflows/ci.yaml
index e714af68..89d531b5 100644
--- a/.gitea/workflows/ci.yaml
+++ b/.gitea/workflows/ci.yaml
@@ -13,7 +13,7 @@ on:
 jobs:
   runtime-diagnostics:
     if: gitea.event_name == 'workflow_dispatch'
-    runs-on: shell
+    runs-on: ubuntu-latest
     steps:
       - name: Read recent CMS runtime errors
         run: |
@@ -30,7 +30,7 @@ jobs:
 
   check:
     if: startsWith(gitea.ref_name, 'v') == false
-    runs-on: shell
+    runs-on: ubuntu-latest
     steps:
       - name: Typecheck, lint, and test
         run: |
@@ -72,7 +72,7 @@ jobs:
   deploy:
     needs: check
     if: gitea.event_name == 'push' && gitea.ref_name == 'main'
-    runs-on: shell
+    runs-on: ubuntu-latest
     steps:
       - name: Deploy
         run: |
@@ -294,7 +294,7 @@ jobs:
 
   release:
     if: startsWith(gitea.ref_name, 'v')
-    runs-on: shell
+    runs-on: ubuntu-latest
     steps:
       - name: Build and deploy
         env:
diff --git a/.gitea/workflows/renovate.yaml b/.gitea/workflows/renovate.yaml
index 6ab09463..be8568b9 100644
--- a/.gitea/workflows/renovate.yaml
+++ b/.gitea/workflows/renovate.yaml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   renovate:
-    runs-on: shell
+    runs-on: ubuntu-latest
     steps:
       - name: Self-hosted Renovate
         run: |