diff --git a/pyproject.toml b/pyproject.toml
index 857f621c..3686f70e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,9 +23,10 @@ dependencies = [
     "scipy",
     "scikit-image",
     "sympy",
+    "pywin32; platform_system == 'Windows'",
 ]
 description = "API for DE Server"
-version = "5.3b5"
+version = "5.3b6"
 keywords = [
     "EELS",
     "STEM",