diff --git a/substrate/docs/CODEOWNERS b/substrate/docs/CODEOWNERS
index 0b9e6e7783..cf2067d194 100644
--- a/substrate/docs/CODEOWNERS
+++ b/substrate/docs/CODEOWNERS
@@ -36,11 +36,13 @@
 /client/consensus/pow/ @sorpaas
 /primitives/consensus/pow/ @sorpaas
 
-# BEEFY
+# BEEFY, MMR
 /client/beefy/ @acatangiu
 /frame/beefy/ @acatangiu
 /frame/beefy-mmr/ @acatangiu
+/frame/merkle-mountain-range/ @acatangiu
 /primitives/beefy/ @acatangiu
+/primitives/merkle-mountain-range/ @acatangiu
 
 # Contracts
 /frame/contracts/ @athei