diff --git a/requirements.txt b/requirements.txt
index 17398e37..0c8fb944 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,3 +7,4 @@ cliff>=1.13.0 # Apache-2.0
 PyYAML>=3.1.0
 python-dateutil>=2.4.2
 six>=1.9.0
+tosca-parser>=0.1.0