diff --git a/book/src/resources.md b/book/src/resources.md
index b082f22f90342f4ad795deead00decd79d2d2f8f..7db8146f126eab4caaeb91aec76667efcd9e2bed 100644
--- a/book/src/resources.md
+++ b/book/src/resources.md
@@ -14,4 +14,4 @@ This is a list of programming and documentation resources in no particular order
     - [Rust design patterns](https://rust-unofficial.github.io/patterns/functional/lenses.html): Book of common rust desing patterns.
 
   - Physics
-    - [Hollistic simulation of optical systems](https://www.db-thueringen.de/receive/dbt_mods_00042053)
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+    - [Holistic simulation of optical systems](https://www.db-thueringen.de/receive/dbt_mods_00042053)
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