diff --git a/tools/addon/komodo.sh b/tools/addon/komodo.sh
index 66ade114a..bd5289b6c 100644
--- a/tools/addon/komodo.sh
+++ b/tools/addon/komodo.sh
@@ -111,6 +111,12 @@ function update() {
     sed -i '/^KOMODO_PASSKEY=/d' "$COMPOSE_ENV"
   fi
 
+  # === v2 migration: ensure PERIPHERY_CORE_PUBLIC_KEYS is set ===
+  if ! grep -q 'PERIPHERY_CORE_PUBLIC_KEYS' "$COMPOSE_ENV"; then
+    echo '## Use the public key generated by Core.' >> "$COMPOSE_ENV"
+    echo 'PERIPHERY_CORE_PUBLIC_KEYS=file:/config/keys/core.pub' >> "$COMPOSE_ENV"
+  fi
+
   # === ensure backups path is set ===
   if ! grep -q 'COMPOSE_KOMODO_BACKUPS_PATH=' "$COMPOSE_ENV"; then
     echo 'COMPOSE_KOMODO_BACKUPS_PATH=/etc/komodo/backups' >>"$COMPOSE_ENV"