diff --git a/lib/protobuf/nats/jnats.rb b/lib/protobuf/nats/jnats.rb
index 78b1116..58bd04b 100644
--- a/lib/protobuf/nats/jnats.rb
+++ b/lib/protobuf/nats/jnats.rb
@@ -87,7 +87,7 @@ def close
       end
 
       def flush(timeout_sec = 0.5)
-       connection.flush(timeout_sec * 1000)
+        connection.flush(timeout_sec * 1000)
       end
 
       def next_message(sub, timeout_sec)