Changing yaml.load to yaml.safe_load per:

https://github.com/yaml/pyyaml/wiki/PyYAML-yaml.load(input)-Deprecation

.gitignore

@@ -1,2 +1,3 @@
 dist/*
+CSR_Generator.egg-info/*
 *.log

csr_tools/csrgen.py

@@ -234,7 +234,7 @@ class Certificate:
         """Parse YAML file and return object generated
         """
         with open(yaml_file, 'r') as stream:
-            cfg = yaml.load(stream)
+            cfg = yaml.safe_load(stream)
         return cfg
 
     def generateKey(self, type, bits):