diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index bd866e0..82630f5
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ gast==0.2.0
 glfw==1.7.0
 grpcio==1.12.0
 gym-dmcontrol==0.0.3
-html5lib==0.9999999
+html5lib==0.99999999
 idna==2.6
 imageio==2.3.0
 ipykernel==4.8.2