diff --git a/python-warlock.spec b/python-warlock.spec
index 0ba34d7..65e9899 100644
--- a/python-warlock.spec
+++ b/python-warlock.spec
@@ -43,7 +43,7 @@ Build self-validating python objects using JSON schemas
 
 %prep
 %setup -q -n warlock-%{version}
-sed -i "s|jsonschema>=0.7,<1|jsonschema>=0.7,<=1|" setup.py
+sed -i "s|jsonschema>=0.7,<1|jsonschema>=0.7,<=1|" requirements.txt
 
 %build
 python setup.py build