diff --git a/composer.json b/composer.json
index 6db6bee3ef718b6c3d9e93e49f5c26c9e419d58c..da5ccb09bb770b2b5f2563ecbbbfe8bcc0be29be 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,7 @@
 {
     "name": "rattail/posterior",
     "description": "Tailbone API Client",
+    "type": "library",
     "homepage": "https://rattailproject.org",
     "license": "GPL-3.0-or-later",
     "autoload": {
@@ -14,5 +15,7 @@
             "email": "lance@edbob.org"
         }
     ],
-    "require": {}
+    "require": {
+        "guzzlehttp/guzzle": "^7.0"
+    }
 }