diff --git a/labs/lab-5.md b/labs/lab-5.md
index 6b1ac59..bfa3366 100644
--- a/labs/lab-5.md
+++ b/labs/lab-5.md
@@ -3,11 +3,11 @@ layout: spec
 latex: true
 ---
 
-# Lab 5: Acceleration & Pressure
+# Lab 4: Acceleration & Pressure
 
 ## Contents
 
-- [Lab 5: Acceleration \& Pressure](#lab-5-acceleration--pressure)
+- [Lab 4: Acceleration \& Pressure](#lab-5-acceleration--pressure)
   - [Contents](#contents)
   - [Materials](#materials)
   - [Introduction](#introduction)