diff --git a/docs/src/overview/core_concepts.md b/docs/src/overview/core_concepts.md
index 888890895b..d32b718b57 100644
--- a/docs/src/overview/core_concepts.md
+++ b/docs/src/overview/core_concepts.md
@@ -24,7 +24,7 @@ run with only the following dependencies:
 ```toml
 [dependencies]
 trillium = "0.2"
-trillium-smol = "0.2"
+trillium-smol = "0.4"
 ```
 
 If we `cargo run` this example, we can then visit