diff --git a/raiwidgets/requirements-dev.txt b/raiwidgets/requirements-dev.txt
index 8c5615e803..0ef5b9fbdb 100644
--- a/raiwidgets/requirements-dev.txt
+++ b/raiwidgets/requirements-dev.txt
@@ -16,7 +16,7 @@ lightgbm==2.3.0
 fairlearn==0.6.0
 
 # Jupyter dependency that fails with python 3.6
-pywinpty==2.0.2; python_version <= '3.6' and sys_platform == 'windows'
+pywinpty==2.0.2; python_version <= '3.6' and sys_platform == 'win32'
 
 # Required for notebook tests
 nbformat