diff --git a/CHANGELOG.md b/CHANGELOG.md
index b6ce6955..41e9c336 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- The docstring for `test_stale_deps` explains the situation with package extensions. ([#203](https://github.com/JuliaTesting/Aqua.jl/pull/203))
+
 
 ## [0.7.3] - 2023-09-25
 
diff --git a/src/stale_deps.jl b/src/stale_deps.jl
index 3ac8985f..fe9eea5f 100644
--- a/src/stale_deps.jl
+++ b/src/stale_deps.jl
@@ -5,7 +5,14 @@ Test that `package` loads all dependencies listed in `Project.toml`.
 Note that this does not imply that `package` loads the dependencies
 directly, this can be achieved via transitivity as well.
 
-!!! note "Known bug"
+!!! note "Weak dependencies and extensions"
+
+    Due to the automatic loading of package extensions once all of
+    their trigger dependencies are loaded, Aqua.jl can, by design of julia,
+    not check if a package extension indeed loads all of its trigger
+    dependencies using `import` or `using`. 
+
+!!! warning "Known bug"
 
     Currently, `Aqua.test_stale_deps` does not detect stale
     dependencies when they are stdlib.  This is considered a bug and