diff --git a/requirements.txt b/requirements.txt
index 11b0ba8..52ef2a9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ python-dateutil==2.4.2
 pythonnet==2.4.0
 pytz==2014.9
 PyVISA==1.10.1
-pywin32==227
+pywin32==301
 pyzmq==16.0.0
 requests==2.20.0
 scikit-learn==0.18.1