diff --git a/LinksAwakeningClient.py b/LinksAwakeningClient.py
index 29878809..aede742b 100644
--- a/LinksAwakeningClient.py
+++ b/LinksAwakeningClient.py
@@ -235,7 +235,7 @@ class RAGameboy():
 
     def check_command_response(self, command: str, response: bytes):
         if command == "VERSION":
-            ok = re.match("\d+\.\d+\.\d+", response.decode('ascii')) is not None
+            ok = re.match(r"\d+\.\d+\.\d+", response.decode('ascii')) is not None
         else:
             ok = response.startswith(command.encode())
         if not ok: