diff --git a/ZMQ-Ports.md b/ZMQ-Ports.md
index 89c971a..42a4708 100644
--- a/ZMQ-Ports.md
+++ b/ZMQ-Ports.md
@@ -1,4 +1,4 @@
-# Intorduction
+# Introduction
 
 PixelatorController communicates with clients (e.g. PixelatorGUI) via two ZMQ ports:
 - Publisher: PixelatorController broadcasts scan data and positioner updates.