diff --git a/setup.cfg b/setup.cfg
index 895d3bb7..edbff24f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -42,7 +42,7 @@ oauth1 =
 betamax =
   betamax>=0.7.0 # Apache-2.0
   fixtures>=3.0.0 # Apache-2.0/BSD
-  mock>=2.0.0 # BSD
+  PyYAML>=3.13 # MIT
 
 [entry_points]