diff --git a/src/kemal/common_log_handler.cr b/src/kemal/common_log_handler.cr
index 5fd31e5..3f3ffa3 100644
--- a/src/kemal/common_log_handler.cr
+++ b/src/kemal/common_log_handler.cr
@@ -1,4 +1,6 @@
 module Kemal
+  # Kemal::CommonLogHandler uses STDOUT by default and handles the logging of request/response process time.
+  # It's also provides a `write` method for common logging purposes.
   class CommonLogHandler < Kemal::BaseLogHandler
     @handler : IO