diff --git a/Pipfile b/Pipfile
index e7b12a9..fc2022b 100644
--- a/Pipfile
+++ b/Pipfile
@@ -9,6 +9,7 @@
 pyparsing = "*"
 PyYAML = "*"
 six = "*"
+pyyaml = "*"
 enum34 = "*"
 # FIXME, issues with compile phase
 #"pygit2" = "*"