diff --git a/requirements.dev.in b/requirements.dev.in
index e535614c..9b31dcf8 100644
--- a/requirements.dev.in
+++ b/requirements.dev.in
@@ -1,4 +1,4 @@
---constraint requirements.prod.in
+-c requirements.prod.in
 
 # Additional dev requirements
 # To generate a requirements file that includes both prod and dev requirements, run: