diff --git a/Development_Contribution.md b/Development_Contribution.md
index fd5f645..f645577 100644
--- a/Development_Contribution.md
+++ b/Development_Contribution.md
@@ -32,7 +32,7 @@ cleanup() {
 cleanup
 
 # Check for pep8
-pycodestyle
+flake8 . --count --show-source --statistics
 if [ $? -ne 0 ]; then
    echo "pep8 failed; early exit."
    exit 1