diff --git a/bin/hued b/bin/hued
index 4451db5..ff6c07b 100755
--- a/bin/hued
+++ b/bin/hued
@@ -61,6 +61,9 @@ engine = Hued::Engine.new
 Signal.trap("INT") { EM.stop }
 Signal.trap("TERM") { EM.stop }
 
+# Write sync to stdout
+$stdout.sync = true
+
 # Trigger rule execution and light status refreshing periodically
 EM.run do
   EM.add_periodic_timer(10) { engine.reload; engine.execute }