diff --git a/.gitattributes b/.gitattributes
index 634b37f..3a4a594 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -2,6 +2,7 @@
 /.github            export-ignore
 /.gitignore         export-ignore
 /tests              export-ignore
+/phpstan*           export-ignore
 /phpunit.xml        export-ignore
 /composer.lock      export-ignore
 /.scrutinizer.yml   export-ignore
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
new file mode 100644
index 0000000..b2a0b23
--- /dev/null
+++ b/.github/workflows/phpstan.yml
@@ -0,0 +1,31 @@
+name: PHPStan
+
+on:
+    pull_request:
+        paths:
+            - '**.php'
+            - 'phpstan.neon.dist'
+
+jobs:
+    phpstan:
+        name: phpstan
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: Setup PHP
+              uses: shivammathur/setup-php@v2
+              with:
+                  php-version: 8.4
+                  coverage: none
+
+            - name: Install composer dependencies
+              uses: ramsey/composer-install@v2
+
+            - name: Install larastan
+              run: |
+                  composer require "larastan/larastan" --no-interaction --no-update
+                  composer update --prefer-dist --no-interaction
+
+            - name: Run PHPStan
+              run: ./vendor/bin/phpstan --error-format=github
diff --git a/.gitignore b/.gitignore
index 3f1dbe8..e5860df 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 /vendor/
 *.phpunit.result.cache
+/build/
 composer.lock
 /.idea
diff --git a/phpstan-baseline.neon b/phpstan-baseline.neon
new file mode 100644
index 0000000..9278bf7
--- /dev/null
+++ b/phpstan-baseline.neon
@@ -0,0 +1,6 @@
+parameters:
+	ignoreErrors:
+		-
+			message: "#^Consider using bind method instead or pass a closure\\.$#"
+			count: 1
+			path: src/ImpersonateServiceProvider.php
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
new file mode 100644
index 0000000..4e42adc
--- /dev/null
+++ b/phpstan.neon.dist
@@ -0,0 +1,23 @@
+includes:
+    - ./vendor/larastan/larastan/extension.neon
+    - phpstan-baseline.neon
+
+parameters:
+    level: 5
+    paths:
+        - src
+        - config
+        - migrations
+    tmpDir: build/phpstan
+    checkOctaneCompatibility: true
+    reportUnmatchedIgnoredErrors: false
+
+    ignoreErrors:
+        - '#Call to an undefined method .*::isImpersonated#'
+        - '#Call to an undefined method .*::canImpersonate#'
+        - '#Call to an undefined method .*::canBeImpersonated#'
+        - '#Call to an undefined method .*::quietLogin#'
+        - '#Call to an undefined method .*::quietLogout#'
+        - '#Call to function method_exists\(\) with Lab404\\Impersonate\\Guard\\SessionGuard .* will always evaluate to true#'
+        - '#Constructor of class Lab404\\Impersonate\\Exceptions\\.* has an unused parameter \$message#'
+        - '#Parameter.* expects Illuminate\\Database\\Eloquent\\Model\|null, Illuminate\\Contracts\\Auth\\Authenticatable given#'
diff --git a/src/Guard/SessionGuard.php b/src/Guard/SessionGuard.php
index 7dff530..d0b4921 100644
--- a/src/Guard/SessionGuard.php
+++ b/src/Guard/SessionGuard.php
@@ -24,7 +24,6 @@ public function quietLogin(Authenticatable $user)
      * Logout the user without updating remember_token
      * and without firing the Logout event.
      *
-     * @param   void
      * @return  void
      */
     public function quietLogout()
diff --git a/src/ImpersonateServiceProvider.php b/src/ImpersonateServiceProvider.php
index 0082015..37fb5c7 100644
--- a/src/ImpersonateServiceProvider.php
+++ b/src/ImpersonateServiceProvider.php
@@ -66,7 +66,6 @@ public function boot()
     /**
      * Register plugin blade directives.
      *
-     * @param void
      * @return  void
      */
     protected function registerBladeDirectives()
@@ -104,7 +103,6 @@ protected function registerBladeDirectives()
     /**
      * Register routes macro.
      *
-     * @param void
      * @return  void
      */
     protected function registerRoutesMacro()
@@ -120,7 +118,6 @@ protected function registerRoutesMacro()
     }
 
     /**
-     * @param void
      * @return  void
      */
     protected function registerAuthDriver()
@@ -152,7 +149,6 @@ protected function registerAuthDriver()
     /**
      * Register plugin middleware.
      *
-     * @param void
      * @return  void
      */
     public function registerMiddleware()
@@ -163,7 +159,6 @@ public function registerMiddleware()
     /**
      * Merge config file.
      *
-     * @param void
      * @return  void
      */
     protected function mergeConfig()
@@ -176,7 +171,6 @@ protected function mergeConfig()
     /**
      * Publish config file.
      *
-     * @param void
      * @return  void
      */
     protected function publishConfig()
diff --git a/src/Models/Impersonate.php b/src/Models/Impersonate.php
index eaa7985..51bb3d6 100644
--- a/src/Models/Impersonate.php
+++ b/src/Models/Impersonate.php
@@ -5,6 +5,7 @@
 use Illuminate\Database\Eloquent\Model;
 use Lab404\Impersonate\Services\ImpersonateManager;
 
+// @phpstan-ignore trait.unused
 trait Impersonate
 {
     /**
diff --git a/src/Services/ImpersonateManager.php b/src/Services/ImpersonateManager.php
index 026c8b5..467b7c3 100644
--- a/src/Services/ImpersonateManager.php
+++ b/src/Services/ImpersonateManager.php
@@ -210,7 +210,7 @@ public function getLeaveRedirectTo(): string
     }
 
     /**
-     * @return array|null
+     * @return string|null
      */
     public function getCurrentAuthGuardName()
     {
@@ -252,11 +252,11 @@ protected function extractAuthCookieFromSession(): void
     }
 
     /**
-     * @param array  $values
+     * @param array|null  $values
      * @param string $search
      * @return \Illuminate\Support\Collection
      */
-    protected function findByKeyInArray(array $values, string $search)
+    protected function findByKeyInArray(?array $values, string $search)
     {
         return collect($values ?? session()->all())
             ->filter(function ($val, $key) use ($search) {
diff --git a/src/helpers.php b/src/helpers.php
index 0d68157..c08160d 100644
--- a/src/helpers.php
+++ b/src/helpers.php
@@ -28,7 +28,7 @@ function can_impersonate(?string $guard = null): bool
 	 * @param  string|null      $guard
 	 * @return bool
 	 */
-		function can_be_impersonated(Authenticatable $user, ?string $guard = null): bool
+	function can_be_impersonated(Authenticatable $user, ?string $guard = null): bool
 	{
 		$guard = $guard ?? app('impersonate')->getCurrentAuthGuardName();
 		return app('auth')->guard($guard)->check()