diff --git a/composer.json b/composer.json
index 608e92ee8..628b919c5 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,11 @@
         "phpunit/phpunit": "^9.5.9"
     },
     "provide": {
-        "psr/http-message-implementation": "1.0"
+        "psr/http-message-implementation": "1.0",
+        "slim/slim": "^3.12.0"
+    },
+    "conflict": {
+        "slim/slim": "*"
     },
     "autoload": {
         "psr-4": {