--- a/requirements-common.txt
+++ b/requirements-common.txt
@@ -66,6 +66,7 @@
 textile==2.1.5
 tg.devtools==2.1.3
 ToscaWidgets==0.9.12
+translationstring==0.4
 TurboGears2==2.1.3
 tw.forms==0.9.9
 WebError==0.10.3