diff --git a/.github/workflows/buildcheck.yml b/.github/workflows/buildcheck.yml
index 0716051..d27836d 100644
--- a/.github/workflows/buildcheck.yml
+++ b/.github/workflows/buildcheck.yml
@@ -37,6 +37,9 @@ jobs:
       - name: PHPUnit
         run: docker exec ci vendor/bin/phpunit
 
+      - name: Static Analysis
+        run: docker exec ci vendor/bin/phpstan analyse --level=9 src tests
+
       - name: Coding Standards
         run: docker exec ci vendor/bin/phpcs
 
diff --git a/composer.json b/composer.json
index f7cf58a..5cbdec2 100644
--- a/composer.json
+++ b/composer.json
@@ -24,6 +24,7 @@
     "require-dev": {
         "mockery/mockery": "^1.6.12",
         "mikey179/vfsstream": "^1.6.12",
+        "phpstan/phpstan": "^1.12",
         "squizlabs/php_codesniffer": "^3.10",
         "phpunit/phpunit": "^9.5.10"
     },
@@ -43,6 +44,7 @@
     "scripts": {
         "test": [
             "vendor/bin/phpunit",
+            "vendor/bin/phpstan analyse --level=9 src tests",
             "vendor/bin/phpcs",
             "@composer validate --strict"
         ]