diff --git a/internal/validation/schemas/config.schema.json b/internal/validation/schemas/config.schema.json
index 7347858..9d0d4b7 100644
--- a/internal/validation/schemas/config.schema.json
+++ b/internal/validation/schemas/config.schema.json
@@ -4,7 +4,8 @@
     "type": "object",
     "properties": {
         "config_version": {
-            "type": "number"
+            "type": "number",
+            "const": 1
         },
         "firewall": {
             "type": ["number","string","boolean","object","array", "null"]