diff --git a/setup.cfg b/setup.cfg
index 7cfaf230..9595ddfe 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -44,7 +44,7 @@ install_requires =
 
 [options.extras_require]
 dev =
-    scrypt >= 0.8.18
+    scrypt >= 0.8.18;platform_system!="Windows"
     sphinx >= 4.3.1
     coveralls >= 3.0.1
     psycopg2 >= 2.9.2