diff --git a/composer.json b/composer.json
index 115b6a8bf85059e6f78528c6db2a1cb0ca2a84be..b88d16765d98e58388f005e35b9ba79e5087e5d6 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     "require": {
         "unicaen/app": "^4.0.3",
         "unicaen/bjy-authorize": "^4.0",
-        "jasig/phpcas": "^1.3",
+        "jasig/phpcas": "1.5.*",
         "ramsey/uuid": "^3.7",
         "laminas/laminas-dependency-plugin": "^2.1"
     },