diff --git a/application/src/main/resources/thingsboard.yml b/application/src/main/resources/thingsboard.yml
index cf29b7c8be..e34f6b52fe 100644
--- a/application/src/main/resources/thingsboard.yml
+++ b/application/src/main/resources/thingsboard.yml
@@ -101,6 +101,7 @@ server:
       # Limit that prohibits resetting the password for the user too often. The value of the rate limit. By default, no more than 5 requests per hour
       reset_password_per_user: "${RESET_PASSWORD_PER_USER_RATE_LIMIT_CONFIGURATION:5:3600}"
     rule_engine:
+      # Deafult timeout for waiting response of REST API request to Rule Engine in milliseconds
       response_timeout: "${DEFAULT_RULE_ENGINE_RESPONSE_TIMEOUT:10000}"
 
 # Application info parameters