diff --git a/composer.json b/composer.json
index 195491c..f809b1c 100644
--- a/composer.json
+++ b/composer.json
@@ -6,8 +6,8 @@
   "license": "GPL-2.0-or-later",
   "minimum-stability": "dev",
   "require": {
-    "symfony/psr-http-message-bridge": "^2.1",
-    "picturae/oai-pmh": "^0.5.20",
-    "nyholm/psr7": "^1.6"
+    "symfony/psr-http-message-bridge": "^2.3",
+    "square-bit/oai-pmh": "dev-master",
+    "nyholm/psr7": "^1.8"
   }
 }