diff --git a/CHANGELOG.md b/CHANGELOG.md
index ea4f3501..24e5e575 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,7 @@ Refactoring:
     - `[core.cache]` [Issue #693](https://github.com/datafolklabs/cement/issues/693)
     - `[core.config]` [Issue #694](https://github.com/datafolklabs/cement/issues/694)
     - `[core.controller]` [Issue #695](https://github.com/datafolklabs/cement/issues/695)
+    - `[core.deprecations]` [Issue #696](https://github.com/datafolklabs/cement/issues/696)
     - `[core.exc]` [Issue #697](https://github.com/datafolklabs/cement/issues/697)
     - `[core.interface]` [Issue #702](https://github.com/datafolklabs/cement/issues/702)
     - `[core.meta]` [Issue #705](https://github.com/datafolklabs/cement/issues/705)
diff --git a/cement/core/deprecations.py b/cement/core/deprecations.py
index edfbbc18..279f8fdf 100644
--- a/cement/core/deprecations.py
+++ b/cement/core/deprecations.py
@@ -8,7 +8,7 @@
 }
 
 
-def deprecate(deprecation_id: str):
+def deprecate(deprecation_id: str) -> None:
     deprecation_id = str(deprecation_id)
     msg = DEPRECATIONS[deprecation_id]
     total_msg = f"{msg}. See: https://docs.builtoncement.com/release-information/deprecations#{deprecation_id}"  # noqa: E501