diff --git a/config/config.yml b/config/config.yml
index 6d13fcb..4b202a0 100644
--- a/config/config.yml
+++ b/config/config.yml
@@ -10,8 +10,8 @@ kafka:
     security_protocol: SASL_SSL
     request_timeout_ms: 20000
     retry_backoff_ms: 500
-    sasl_user: SASL_USER  # read from environment variable
-    sasl_password: SASL_PASSWORD  # read from environment variable
+    sasl_user: KAFKA_SASL_USER  # read from environment variable
+    sasl_password: KAFKA_SASL_PASSWORD  # read from environment variable
 
 schemaRegistry:
     endpoint: SCHEMA_REGISTRY_ENDPOINT