diff --git a/.gitea/workflows/lint.yaml b/.gitea/workflows/lint.yaml
index 1e5b3ad3f..cb3122e39 100644
--- a/.gitea/workflows/lint.yaml
+++ b/.gitea/workflows/lint.yaml
@@ -17,8 +17,28 @@ jobs:
       - name: checkout source
         uses: actions/checkout@v3
 
+      - name: calculate cache key hash
+        uses: actions/go-hashfiles@v0.0.1
+        id: cache-hash
+        with:
+          patterns: |
+            classes/*.php
+            include/*.php
+            plugins/**/*.php
+
       - name: phpunit
         run: php81 ./vendor/bin/phpunit
 
+      - uses: https://github.com/actions/cache/restore@v3
+        id: cache-phpstan
+        with:
+          path: /tmp/phpstan
+          key: ${{ runner.os }}-phpstan-${{ steps.cache-hash.outputs.hash }}
+
       - name: phpstan
         run: php81 -d memory_limit=-1 ./vendor/bin/phpstan --memory-limit=2G
+
+      - uses: https://github.com/actions/cache/save@v3
+        with:
+          path: /tmp/phpstan
+          key: ${{ steps.cache-phpstan.outputs.cache-primary-key }}
diff --git a/Jenkinsfile b/Jenkinsfile
deleted file mode 100644
index 778d80c5d..000000000
--- a/Jenkinsfile
+++ /dev/null
@@ -1,33 +0,0 @@
-pipeline {
-    agent any
-
-    options {
-        buildDiscarder(logRotator(numToKeepStr: '5'))
-    }
-
-    stages {
-        stage('phpunit') {
-            steps {
-                sh """
-                docker run --rm \
-                    --workdir /app \
-                    -v ${env.WORKSPACE}:/app \
-                    registry.fakecake.org/php:8.1-cli \
-                    php ./vendor/bin/phpunit
-                """
-            }
-        }
-        stage('phpstan') {
-            steps {
-                sh """
-                # php -d memory_limit=-1 ....
-                docker run --rm \
-                    --workdir /app \
-                    -v ${env.WORKSPACE}:/app \
-                    registry.fakecake.org/php:8.1-cli \
-                    php -d memory_limit=-1 ./vendor/bin/phpstan --memory-limit=2G
-                """
-            }
-        }
-    }
-}