diff --git a/HISTORY.md b/HISTORY.md
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@@ -3,6 +3,7 @@
 ## Unreleased
 
 - Fixed `CloudPath(...) / other` to correctly attempt to fall back on `other`'s `__rtruediv__` implementation, in order to support classes that explicitly support the `/` with a `CloudPath` instance. Previously, this would always raise a `TypeError` if `other` were not a `str` or `PurePosixPath`. (PR [#479](https://github.com/drivendataorg/cloudpathlib/pull/479))
+- Add `md5` property to `GSPath`, updated LocalGSPath to include `md5` property, updated mock_gs.MockBlob to include `md5_hash` property.
 
 ## v0.20.0 (2024-10-18)