diff --git a/requirements.txt b/requirements.txt
index e1f78ca..512551e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,6 +9,7 @@ certifi==2018.10.15
 chardet==3.0.4
 cycler==0.10.0
 dataset==1.1.0
+davteutil
 idna==2.7
 idna-ssl==1.1.0
 kiwisolver==1.0.1