diff --git a/NEWS.md b/NEWS.md
index d3e161f8..266e995c 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,13 @@
 # Molly.jl release notes
 
+## v0.21.1 - Jul 2024
+
+### Non-breaking changes
+- Compatibility bounds are updated for various packages.
+
+### Bug fixes
+- A bug in boundary gradient calculation is fixed.
+
 ## v0.21.0 - Apr 2024
 
 ### Breaking changes
diff --git a/Project.toml b/Project.toml
index 6514a0dd..f252ebf6 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Molly"
 uuid = "aa0f7f06-fcc0-5ec4-a7f3-a573f33f9c4c"
 authors = ["Joe G Greener <jgreener@hotmail.co.uk>"]
-version = "0.21.0"
+version = "0.21.1"
 
 [deps]
 Atomix = "a9b6321e-bd34-4604-b9c9-b65b8de01458"