diff --git a/requirements.txt b/requirements.txt
index 1e6db95..e985cd7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 bleach==1.5.0
 click==6.7
 Flask==0.12
-html5lib==0.9999999
+html5lib==0.999999999
 mstranslator
 requests>=2.18.1
 six==1.10.0