diff --git a/meta.yaml b/meta.yaml
index bf2e5f32e3..ac54022b2a 100644
--- a/meta.yaml
+++ b/meta.yaml
@@ -49,6 +49,7 @@ requirements:
     - netCDF4
     - numba
     - numpy
+    - mock>=3.0.5,<4.0
     - prov
     - psutil
     - pydot
diff --git a/setup.py b/setup.py
index c34a06005f..7b80ffa695 100755
--- a/setup.py
+++ b/setup.py
@@ -48,7 +48,7 @@
     # Execute 'python setup.py test' to run tests
     'test': [
         'easytest',
-        'mock',
+        'mock>=3.0.5,<4.0',
         'nose',
         'pytest>=3.9',
         'pytest-cov',