diff --git a/dev_requirements.txt b/dev_requirements.txt
index 69db5f2..370bef3 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -7,3 +7,4 @@ pytest==3.4.2
 pytest-cov==2.5.1
 requests==2.21.0
 schedule==0.5.0
+coverage==4.5.2