diff --git a/test-requirements.txt b/test-requirements.txt
index d17b78a..866af75 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,9 +4,9 @@
 
 hacking<0.13,>=0.12.0 # Apache-2.0
 
-coverage>=4.0 # Apache-2.0
+coverage!=4.4,>=4.0 # Apache-2.0
 python-subunit>=0.0.18 # Apache-2.0/BSD
-sphinx>=1.5.1 # BSD
+sphinx!=1.6.1,>=1.5.1 # BSD
 sphinxcontrib-seqdiag # BSD
 # Required for RTD build
 os-dpm>=1.0.0 # Apache-2.0