diff --git a/docs/sph4u7.md b/docs/sph4u7.md
index 2c6881b..cca985d 100644
--- a/docs/sph4u7.md
+++ b/docs/sph4u7.md
@@ -7,4 +7,4 @@ The course code for this page is **SPH4U7**.
  - [IB Physics Data Booklet](/resources/g11/ib-physics-data-booklet.pdf)
  - [IB SL Physics Syllabus](/resources/g11/ib-physics-syllabus.pdf)
  - [Dealing with Uncertainties](/resources/g11/physics-uncertainties.pdf)
- - [External: IB Physics Notes](ibphysics.org)
+ - [External: IB Physics Notes](https://ibphysics.org)