diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd18a030cee1584044fa1d3c80ada218a735af63..2b2a1cf9f0176b627f205e4a3bbcd0bae0cab2ca 100644
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+++ b/CHANGELOG.md
@@ -1,3 +1,19 @@
+# v0.13.3 (2019-12-23)
+
+This release contains more major performance improvements for Spack
+environments, as well as bugfixes for mirrors and a `python` issue with
+RHEL8.
+
+* mirror bugfixes: symlinks, duplicate patches, and exception handling (#13789)
+* don't try to fetch `BundlePackages` (#13908)
+* avoid re-fetching patches already added to a mirror (#13908)
+* avoid re-fetching alread added patches (#13908)
+* avoid re-fetching alread added patches (#13908)
+* allow repeated invocations of `spack mirror create` on the same dir (#13908)
+* bugfix for RHEL8 when `python` is unavailable (#14252)
+* improve concretization performance in environments (#14190)
+* improve installation performance in environments (#14263)
+
 # v0.13.2 (2019-12-04)
 
 This release contains major performance improvements for Spack environments, as