diff --git a/src/main/java/icu/samnyan/aqua/sega/allnet/AllNet.kt b/src/main/java/icu/samnyan/aqua/sega/allnet/AllNet.kt
index 852509e4..c6fd582d 100644
--- a/src/main/java/icu/samnyan/aqua/sega/allnet/AllNet.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/allnet/AllNet.kt
@@ -104,6 +104,12 @@ class AllNet(
 
         var session: String? = null
 
+        val gameId = reqMap["game_id"] ?: return "".also { logger.warn("> Rejected: No game_id provided") }
+        val ver = reqMap["ver"] ?: "1.0"
+
+        if ((ver.toDoubleOrNull() ?: 0.0) < 1.0)
+            return "".also { logger.warn("> Rejected: Version $ver is not allowed (typically bad ICF)") }
+
         // Proper keychip authentication
         if (props.checkKeychip) {
             // If it's a user keychip, it should be in user database
@@ -129,8 +135,6 @@ class AllNet(
             }
         }
 
-        val gameId = reqMap["game_id"] ?: return "".also { logger.warn("> Rejected: No game_id provided") }
-        val ver = reqMap["ver"] ?: "1.0"
 
         val formatVer = reqMap["format_ver"] ?: ""
         val resp = props.map.mut + mapOf(