diff --git a/titles/ongeki/index.py b/titles/ongeki/index.py
index d7f3e0e..f91bf8f 100644
--- a/titles/ongeki/index.py
+++ b/titles/ongeki/index.py
@@ -216,16 +216,20 @@ class OngekiServlet(BaseServlet):
             )
             return Response(zlib.compress(b'{"stat": "0"}'))
 
-        try:
-            unzip = zlib.decompress(req_raw)
+        if version < 105:
+            # O.N.G.E.K.I base don't use zlib
+            req_data = req_raw
+        else:
+            try:
+                unzip = zlib.decompress(req_raw)
+    
+            except zlib.error as e:
+                self.logger.error(
+                    f"Failed to decompress v{version} {endpoint} request -> {e}"
+                )
+                return Response(zlib.compress(b'{"stat": "0"}'))
 
-        except zlib.error as e:
-            self.logger.error(
-                f"Failed to decompress v{version} {endpoint} request -> {e}"
-            )
-            return Response(zlib.compress(b'{"stat": "0"}'))
-
-        req_data = json.loads(unzip)
+            req_data = json.loads(unzip)
 
         self.logger.info(
             f"v{version} {endpoint} request from {client_ip}"
@@ -251,9 +255,12 @@ class OngekiServlet(BaseServlet):
 
         self.logger.debug(f"Response {resp}")
 
-        zipped = zlib.compress(json.dumps(resp, ensure_ascii=False).encode("utf-8"))
+        resp_raw = json.dumps(resp, ensure_ascii=False).encode("utf-8")
+        zipped = zlib.compress(resp_raw)
 
         if not encrtped or version < 120:
+            if version < 105:
+                return Response(resp_raw)
             return Response(zipped)
 
         padded = pad(zipped, 16)