diff --git a/src/pymc_core/companion/constants.py b/src/pymc_core/companion/constants.py
index 63cd292..d2f8090 100644
--- a/src/pymc_core/companion/constants.py
+++ b/src/pymc_core/companion/constants.py
@@ -98,7 +98,7 @@ class BinaryReqType(IntEnum):
 # CMD_SEND_ANON_REQ (owner requests, etc.) is supported.
 # 10+ provides support for multi-byte path lengths.
 # 11+ adds channel binary datagrams and default flood scope commands.
-FIRMWARE_VER_CODE = 11
+FIRMWARE_VER_CODE = 10
 
 # ---------------------------------------------------------------------------
 # Commands (app -> radio)