diff --git a/docs/changelog.md b/docs/changelog.md
index 929709ec9..40b55c108 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -49,3 +49,21 @@
 - Fix failing to build docs #64
 - Revise the logic of `num_classes` in basic conditional gan #69
 - Support dynamic eval internal in eval hook #73
+
+
+## v0.4.0 (03/11/2021)
+
+#### Highlights
+- Add more experiments for conditional GANs: SNGAN, SAGAN, and BigGAN
+- Refact Translation Model (#88, #126, #127, #145)
+
+#### New Features
+
+- Use PyTorch Sphinx theme #123
+- Support torchserve for unconditional models #131
+
+#### Fix bugs and Improvements
+
+- Add CI for python3.9 #110
+- Add support for PyTorch1.9 #115
+- Add pre-commit hook for spell checking #135
diff --git a/mmgen/version.py b/mmgen/version.py
index 064d85660..76af21181 100644
--- a/mmgen/version.py
+++ b/mmgen/version.py
@@ -1,5 +1,5 @@
 # Copyright (c) OpenMMLab. All rights reserved.
-__version__ = '0.3.0'
+__version__ = '0.4.0'
 
 
 def parse_version_info(version_str):