diff --git a/requirements.txt b/requirements.txt
index c9509c040..2837966c4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ PyOpenSSL==19.1.0; python_version <= '2.7'
 # testing
 pytest==5.3.2
 betamax==0.8.1
-coverage==4.5.4
+coverage<=4.5.99
 pytest-cov==2.8.1
 coveralls==1.9.2