diff --git a/titles/chuni/index.py b/titles/chuni/index.py
index 376ea85..174d51e 100644
--- a/titles/chuni/index.py
+++ b/titles/chuni/index.py
@@ -121,7 +121,7 @@ class ChuniServlet(BaseServlet):
             f"{ChuniConstants.VER_CHUNITHM_LUMINOUS}_chn": 8,
             ChuniConstants.VER_CHUNITHM_LUMINOUS_PLUS: 56,
             ChuniConstants.VER_CHUNITHM_VERSE: 42,
-            f"{ChuniConstants.VER_CHUNITHM_VERSE}_chn": 37,
+            f"{ChuniConstants.VER_CHUNITHM_VERSE}_chn": 31,
             ChuniConstants.VER_CHUNITHM_X_VERSE: 14,
             f"{ChuniConstants.VER_CHUNITHM_X_VERSE}_int": 96,
         }
diff --git a/titles/mai2/base.py b/titles/mai2/base.py
index 1983ef7..1f61fe7 100644
--- a/titles/mai2/base.py
+++ b/titles/mai2/base.py
@@ -1024,3 +1024,6 @@ class Mai2Base:
         return {"userId": data["userId"], "userRecommendSelectionMusicIdList": []}
     async def handle_get_user_score_ranking_api_request(self, data: Dict) ->Dict:
         return {"userId": data["userId"], "userScoreRanking": []}
+
+    async def handle_ping_request(self, data: Dict) -> Dict:
+        return {"returnCode": 1}
\ No newline at end of file
diff --git a/titles/mai2/index.py b/titles/mai2/index.py
index d753379..cbb1a9e 100644
--- a/titles/mai2/index.py
+++ b/titles/mai2/index.py
@@ -242,8 +242,6 @@ class Mai2Servlet(BaseServlet):
     async def handle_mai(self, request: Request) -> bytes:
         endpoint: str = request.path_params.get('endpoint')
         version: int = request.path_params.get('version')
-        if endpoint.lower() == "ping":
-            return Response(zlib.compress(b'{"returnCode": "1"}'))
         
         req_raw = await request.body()
         internal_ver = 0
@@ -318,9 +316,6 @@ class Mai2Servlet(BaseServlet):
         version: int = request.path_params.get('version')
         game_code = request.path_params.get('game')
 
-        if endpoint.lower() == "ping":
-            return Response(zlib.compress(b'{"returnCode": "1"}'))
-
         req_raw = await request.body()
         internal_ver = 0
         client_ip = Utils.get_ip_addr(request)
@@ -389,8 +384,10 @@ class Mai2Servlet(BaseServlet):
               internal_ver = Mai2Constants.VER_MAIMAI_DX_FESTIVAL
           elif version >= 140 and version < 150:  # BUDDiES
               internal_ver = Mai2Constants.VER_MAIMAI_DX_BUDDIES
-          elif version >= 150: # PRiSM
+          elif version >= 150 and version < 155:  # PRiSM
               internal_ver = Mai2Constants.VER_MAIMAI_DX_PRISM
+          elif version >= 155:  # PRiSM PLUS
+              internal_ver = Mai2Constants.VER_MAIMAI_DX_PRISM_PLUS
 
 
         if all(c in string.hexdigits for c in endpoint) and len(endpoint) == 32: