diff --git a/composer.json b/composer.json
index c2b1b228..0b0c819a 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
         "php-http/message": "^1.13",
         "php-http/message-factory": "^1.0",
         "phpdocumentor/reflection-docblock": "^5.0",
-        "psr/http-message": "^1.0",
+        "psr/http-message": "^1.0 || ^2.0",
         "symfony/options-resolver": "^6.3",
         "symfony/property-access": "^6.3",
         "symfony/property-info": "^6.3",
diff --git a/tests/Utility/ResponseToArrayHelperTest.php b/tests/Utility/ResponseToArrayHelperTest.php
index 9cdcbe28..6f653d5f 100644
--- a/tests/Utility/ResponseToArrayHelperTest.php
+++ b/tests/Utility/ResponseToArrayHelperTest.php
@@ -19,6 +19,7 @@
 namespace Apigee\Edge\Tests\Utility;
 
 use Apigee\Edge\Tests\Test\Utility\ResponseToArrayHelper;
+use GuzzleHttp\Psr7\Utils;
 use PHPUnit\Framework\TestCase;
 use Psr\Http\Message\ResponseInterface;
 
@@ -50,13 +51,13 @@ public function testExpandCompatibility($edgeResponse, $hybridResponse): void
         /** @var \Psr\Http\Message\ResponseInterface $response1 */
         $response1 = $this->getMockBuilder(ResponseInterface::class)->getMock();
         $response1->method('getHeaderLine')->willReturn('application/json');
-        $response1->method('getBody')->willReturn($edgeResponse);
+        $response1->method('getBody')->willReturn(Utils::streamFor($edgeResponse));
         $decodedEdgeStyle = $this->responseToArrayHelper->convertResponseToArray($response1, false);
 
         /** @var \Psr\Http\Message\ResponseInterface $response2 */
         $response2 = $this->getMockBuilder(ResponseInterface::class)->getMock();
         $response2->method('getHeaderLine')->willReturn('application/json');
-        $response2->method('getBody')->willReturn($hybridResponse);
+        $response2->method('getBody')->willReturn(Utils::streamFor($hybridResponse));
         $decodedWithCompatibility = $this->responseToArrayHelper->convertResponseToArray($response2, true);
 
         $this->assertEquals($decodedEdgeStyle, $decodedWithCompatibility);