diff --git a/requirements.txt b/requirements.txt
index 6cd80ef..dbbda33 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ docker>=4.2.0
 domdf-python-tools>=1.7.0
 jinja2>=2.10.1
 numpy>=1.19.1; platform_system != "Windows"
-numpy==1.19.3; platform_system == "Windows"
+numpy==1.19.4; platform_system == "Windows"
 pymassspec>=2.2.20
 requests>=2.22.0
 sdjson>=0.2.6