diff --git a/psalm.xml b/psalm.xml
new file mode 100644
index 0000000..9b8996c
--- /dev/null
+++ b/psalm.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0"?>
+<psalm
+    errorLevel="1"
+    resolveFromConfigFile="true"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="https://getpsalm.org/schema/config"
+    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+    cacheDirectory="./runtime/psalm"
+>
+    <projectFiles>
+        <directory name="src/" />
+    </projectFiles>
+
+    <issueHandlers>
+        <LessSpecificReturnType errorLevel="info" />
+    </issueHandlers>
+</psalm>
diff --git a/src/AbstractService.php b/src/AbstractService.php
index ddeae82..04820cb 100644
--- a/src/AbstractService.php
+++ b/src/AbstractService.php
@@ -88,7 +88,7 @@ protected function handleResponse(
         RequestInterface $request,
         ResponseInterface $response
     ): array {
-        $contents = $response->getBody()->getContents();
+        $contents = $response->getBody()->__toString();
         $parsedBody = json_decode($contents, true);
 
         if (!is_array($parsedBody)) {