diff --git a/.circle/requirements-pack-tests.txt b/.circle/requirements-pack-tests.txt
index 5a6c4615..84bf40d6 100644
--- a/.circle/requirements-pack-tests.txt
+++ b/.circle/requirements-pack-tests.txt
@@ -1,4 +1,4 @@
-mock>=1.3.0,<2.0
+mock>=1.3.0,<2.1
 unittest2>=1.1.0,<2.0
 nose>=1.3.7
 # temporary workaround for travis issue
diff --git a/.circle/validate.py b/.circle/validate.py
index a355d28d..db453644 100644
--- a/.circle/validate.py
+++ b/.circle/validate.py
@@ -27,7 +27,7 @@
 
 def load_yaml_file(path):
     with open(path, 'r') as stream:
-        text = yaml.load(stream)
+        text = yaml.safe_load(stream)
 
     return text