(cherry picked from commit 4e60480fdc5fffaa1cd70d1e5bdade81ed1b4e14)
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# Changelog
+## Unreleased
+
+ * `ERC721`: made `_approve` an internal function (was private).
## 3.4.0 (2021-02-02)
* `BeaconProxy`: added new kind of proxy that allows simultaneous atomic upgrades. ([#2411](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2411))