diff --git a/requirements.txt b/requirements.txt
index 83e3955d..0d131990 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ ete3==3.0.0b35
 psycopg2==2.7.1
 python-nexus==1.42
 six==1.10.0
-coverage==4.4
+coverage==4.4.1
 flake8==3.3.0
 newick==0.7
 clldutils==1.9.5