diff --git a/lib/sync.rb b/lib/sync.rb
index 070acea..58e4700 100644
--- a/lib/sync.rb
+++ b/lib/sync.rb
@@ -52,6 +52,7 @@ class Sync
 
   def log(s)
     puts "#{Time.now}: #{s}"
+    $stdout.flush
   end