diff --git a/README.md b/README.md
index 1b2b29f5..8d1d9780 100644
--- a/README.md
+++ b/README.md
@@ -219,7 +219,7 @@ the zipline codebase adheres to both PEP-8,
.
The maintainers check the code using the flake8 script,
-, which is included in the
+, which is included in the
requirements_dev.txt.
Before submitting patches or pull requests, please ensure that your