diff --git a/README.md b/README.md
index b3e0622..e05b0bd 100644
--- a/README.md
+++ b/README.md
@@ -95,6 +95,7 @@ $client->singleCall("GET", $guzzleParameterArray);
 
 ## Changelog
 
+* 0.1.15 Enable returning PDFs (thx ewaldmedia)
 * 0.1.14 Add _short period write limit reached_ error handling (thx resslinger)
 * 0.1.13 Change from [Laravels `str_contains`](https://github.com/laravel/framework/blob/8.x/src/Illuminate/Support/Str.php#L181) to [PHPs `stripos()`](https://www.php.net/manual/de/function.stripos.php) because [it doesn't require `ext-mbstring`](https://github.com/repat/plentymarkets-rest-client/pull/16#issuecomment-880731813) (thx DanMan)
 * 0.1.12 Remove `danielstjules/stringy` dependency, copy over [Laravels `str_contains`](https://github.com/laravel/framework/blob/8.x/src/Illuminate/Support/Str.php#L181) instead
diff --git a/composer.json b/composer.json
index e085e8f..c75e372 100644
--- a/composer.json
+++ b/composer.json
@@ -5,24 +5,12 @@
     "keywords": ["plentymarkets", "pm", "rest", "api", "client", "sdk"],
     "homepage": "https://github.com/repat/plentymarkets-rest-client",
     "license": "MIT",
-    "version" : "0.1.14",
+    "version" : "0.1.15",
     "authors": [
         {
             "name": "repat",
             "email": "repat@repat.de",
             "role": "Developer"
-        },
-        {
-            "name": "hepisec",
-            "role": "Contributor"
-        },
-        {
-            "name": "daniel-mannheimer",
-            "role": "Contributor"
-        },
-        {
-            "name": "fwehrhausen",
-            "role": "Contributor"
         }
     ],
     "require": {
diff --git a/src/PlentymarketsRestClient/PlentymarketsRestClient.php b/src/PlentymarketsRestClient/PlentymarketsRestClient.php
index 8d30f04..c06034c 100644
--- a/src/PlentymarketsRestClient/PlentymarketsRestClient.php
+++ b/src/PlentymarketsRestClient/PlentymarketsRestClient.php
@@ -115,11 +115,16 @@ public function singleCall($method, $path, $params = [])
             $this->handleRateLimiting($response);
         }
 
-        if($response->getHeaders()['Content-Type'][0] == 'application/pdf'){
+        $headers = $response->getHeaders();
+
+        if (is_array($headers)
+            && array_key_exists('Content-Type', $headers)
+            && array_key_exists(0, $headers['Content-Type'])
+            && $headers['Content-Type'][0] === 'application/pdf') {
             return $response->getBody()->getContents();
-        }else{
-            return json_decode($response->getBody(), true);
         }
+
+        return json_decode($response->getBody(), true);
     }
 
     public function get($path, $array = [])