diff --git a/composer.json b/composer.json
index b32976e..60fb31f 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,8 @@
         "php-http/async-client-implementation": "^1.0",
         "php": "^7.3",
         "symfony/options-resolver": "^4.3",
-        "ext-json": "*"
+        "ext-json": "*",
+        "php-http/message": "^1.8"
     },
     "autoload": {
         "psr-4": { "Gitlab\\": "lib/Gitlab/" }
diff --git a/composer.lock b/composer.lock
index 72c0290..6eb989a 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "d2262ccfc7bf8460224546d463d8a30c",
+    "content-hash": "e553087e3ad420214c323572382f1dfa",
     "packages": [
         {
             "name": "clue/stream-filter",
@@ -2631,7 +2631,8 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "^7.3"
+        "php": "^7.3",
+        "ext-json": "*"
     },
     "platform-dev": []
 }