diff --git a/docs/changelogs/v3.3.1.md b/docs/changelogs/v3.3.1.md
index 9b6eed73..cc4b5017 100644
--- a/docs/changelogs/v3.3.1.md
+++ b/docs/changelogs/v3.3.1.md
@@ -4,6 +4,9 @@
 
 * Support `Cautious` variant to `AdaShift` optimizer. (#310)
 * Save the state of the `Lookahead` optimizer too. (#310)
+* Implement `APOLLO` optimizer. (#311, #312)
+    * [SGD-like Memory, AdamW-level Performance](https://arxiv.org/abs/2412.05270) 
+* Rename the `Apollo` (`An Adaptive Parameter-wise Diagonal Quasi-Newton Method for Nonconvex Stochastic Optimization`) optimizer name to `ApolloDQN` not to overlap with the new optimizer name `APOLLO`. (#312)
 
 ### Bug