diff --git a/update-setup.sh b/update-setup.sh
index 002fdd2..50dc293 100755
--- a/update-setup.sh
+++ b/update-setup.sh
@@ -301,11 +301,11 @@ update_authelia_config() {
         # Update domain settings from .env
         echo -e "${BLUE}Applying Tailscale domain settings...${NC}"
 
-        # Replace placeholder full hostname
-        yq e -i "walk(if type == \"string\" and . == \"tailscale-nas.your-tailnet.ts.net\" then \"${FULL_HOSTNAME}\" else . end)" "$TEMP_CONFIG"
+        # Replace placeholder full hostname - using proper yq syntax instead of walk()
+        yq e -i "(.. | select(tag == \"!!str\" and . == \"tailscale-nas.your-tailnet.ts.net\")) = \"${FULL_HOSTNAME}\"" "$TEMP_CONFIG"
 
-        # Replace placeholder tailnet domain
-        yq e -i "walk(if type == \"string\" and . == \"your-tailnet.ts.net\" then \"${TAILNET_DOMAIN}\" else . end)" "$TEMP_CONFIG"
+        # Replace placeholder tailnet domain - using proper yq syntax instead of walk()
+        yq e -i "(.. | select(tag == \"!!str\" and . == \"your-tailnet.ts.net\")) = \"${TAILNET_DOMAIN}\"" "$TEMP_CONFIG"
 
         # Move temp file to final location
         mv "$TEMP_CONFIG" "$AUTHELIA_CONFIG"