diff --git a/doc/requirements.txt b/doc/requirements.txt
index b42fb237..9bdd4cec 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -6,7 +6,6 @@ testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 
 # The below is rewquired to build testing module reference
-mock>=2.0.0 # BSD
 
 # Include horizon as test requirement
 horizon
diff --git a/lower-constraints.txt b/lower-constraints.txt
index 1954fdbe..c6564fca 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -40,7 +40,6 @@ keystoneauth1==3.4.0
 linecache2==1.0.0
 MarkupSafe==1.0
 mccabe==0.2.1
-mock==2.0.0
 monotonic==1.4
 mox3==0.25.0
 msgpack==0.5.6