diff --git a/requirements.txt b/requirements.txt
index 3b6f6dcbc..303324f0a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ jsonschema==2.6.0
 numpy==1.14.2
 TA-Lib==0.4.17
 pytest==3.5.0
-pytest-mock==1.8.0
+pytest-mock==1.9.0
 pytest-cov==2.5.1
 hyperopt==0.1
 # do not upgrade networkx before this is fixed https://github.com/hyperopt/hyperopt/issues/325