diff --git a/custom_components/ocpp/manifest.json b/custom_components/ocpp/manifest.json
index 46b7422e..65145087 100644
--- a/custom_components/ocpp/manifest.json
+++ b/custom_components/ocpp/manifest.json
@@ -13,7 +13,8 @@
 	"issue_tracker": "https://github.com/lbbrhzn/ocpp/issues",
 	"requirements": [
 		"ocpp>=0.14.1",
-		"websockets>=10.2"
+		"websockets>=10.2",
+		"jsonschema==4.19.0"
 	],
 	"version": "0.4.36"
 }