diff --git a/composer.json b/composer.json
index 122500d62e026ab2045396a2d3772c7b1f66e1fe..2fdcc6d0d1f5388dfb891a7e22e1e3826cf0cc08 100644
--- a/composer.json
+++ b/composer.json
@@ -6,5 +6,8 @@
     "require": {
         "simplesamlphp/composer-module-installer": "~1.0",
         "hab/picaauth": "~0.1"
+    },
+    "require-dev": {
+        "simplesamlphp/simplesamlphp": "~1.13"
     }
 }