diff --git a/lib/yabeda/prometheus/exporter.rb b/lib/yabeda/prometheus/exporter.rb
index 6b5b189..786e53f 100644
--- a/lib/yabeda/prometheus/exporter.rb
+++ b/lib/yabeda/prometheus/exporter.rb
@@ -60,7 +60,7 @@ def start_app(raise_start_error: true, **rack_app_options)
             AccessLog: [],
           )
         rescue Errno::EADDRINUSE
-          puts "Failed to start server might be started by another process"
+          puts "Yabeda prometheus exporter: Failed to start, server might be started by another process"
           raise if raise_start_error
         end
       end