diff --git a/README.md b/README.md
index e05e0a1..73a48af 100644
--- a/README.md
+++ b/README.md
@@ -15,3 +15,10 @@ same network as this computer.
 # Running on Windows
 
 Right click on sudomemoDNS_##.exe (the ## will instead show the version number) and click on "Run as administrator".
+
+# Building on Windows
+
+Install dnslib and requests via npm (as well as pyinstaller) and then build with pyinstaller:
+
+C:\Users\Administrator\sudomemo-dns>C:\Users\Administrator\AppData\Local\Programs\Python\Python36\Scripts\pyinstaller.exe sud
+omemoDNS_v1.0.spec