diff --git a/requirements.txt b/requirements.txt
index f07cdf86..dbfdbd78 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,6 @@ decorator==4.0.11
 docutils==0.13.1
 Flask==0.12.2
 funcsigs==1.0.2
-html5lib==0.999999999
 httpbin==0.5.0
 idna==2.5
 imagesize==0.7.1