diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77ec07026..cbc3ee4fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,47 @@
 # Fornjot - Changelog
 
+## v0.40.0 (2023-03-13)
+
+### End-user improvements
+
+Improvements to Fornjot and its documentation that are visible to end users.
+
+*None this week. Busy working on the kernel!*
+
+### Ecosystem improvements
+
+Improvements to Fornjot components that are relevant to developers building on top of those. These have an indirect effect on end users, through fixed bugs and improved robustness.
+
+#### `fj-kernel`
+
+- Unify `HalfEdge` and `PartialHalfEdge` ([#1660], [#1661], [#1662], [#1663], [#1664])
+- Rewrite `HalfEdgeBuilder` ([#1665])
+
+### Internal Improvements
+
+Improvements that are relevant to developers working on Fornjot itself.
+
+- Update dependencies ([#1651], [#1652], [#1653], [#1654], [#1655], [#1656], [#1657], [#1658], [#1659])
+- Update list of sponsors in README ([#1667])
+
+[#1651]: https://github.com/hannobraun/Fornjot/pull/1651
+[#1652]: https://github.com/hannobraun/Fornjot/pull/1652
+[#1653]: https://github.com/hannobraun/Fornjot/pull/1653
+[#1654]: https://github.com/hannobraun/Fornjot/pull/1654
+[#1655]: https://github.com/hannobraun/Fornjot/pull/1655
+[#1656]: https://github.com/hannobraun/Fornjot/pull/1656
+[#1657]: https://github.com/hannobraun/Fornjot/pull/1657
+[#1658]: https://github.com/hannobraun/Fornjot/pull/1658
+[#1659]: https://github.com/hannobraun/Fornjot/pull/1659
+[#1660]: https://github.com/hannobraun/Fornjot/pull/1660
+[#1661]: https://github.com/hannobraun/Fornjot/pull/1661
+[#1662]: https://github.com/hannobraun/Fornjot/pull/1662
+[#1663]: https://github.com/hannobraun/Fornjot/pull/1663
+[#1664]: https://github.com/hannobraun/Fornjot/pull/1664
+[#1665]: https://github.com/hannobraun/Fornjot/pull/1665
+[#1667]: https://github.com/hannobraun/Fornjot/pull/1667
+
+
 ## v0.39.0 (2023-03-06)
 
 ### End-user improvements
diff --git a/Cargo.lock b/Cargo.lock
index 6ccd94884..52e559cde 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1036,7 +1036,7 @@ dependencies = [
 
 [[package]]
 name = "fj"
-version = "0.39.0"
+version = "0.40.0"
 dependencies = [
  "anyhow",
  "fj-proc",
@@ -1046,7 +1046,7 @@ dependencies = [
 
 [[package]]
 name = "fj-app"
-version = "0.39.0"
+version = "0.40.0"
 dependencies = [
  "anyhow",
  "clap",
@@ -1066,7 +1066,7 @@ dependencies = [
 
 [[package]]
 name = "fj-export"
-version = "0.39.0"
+version = "0.40.0"
 dependencies = [
  "fj-interop",
  "fj-math",
@@ -1077,7 +1077,7 @@ dependencies = [
 
 [[package]]
 name = "fj-host"
-version = "0.39.0"
+version = "0.40.0"
 dependencies = [
  "cargo_metadata",
  "crossbeam-channel",
@@ -1093,14 +1093,14 @@ dependencies = [
 
 [[package]]
 name = "fj-interop"
-version = "0.39.0"
+version = "0.40.0"
 dependencies = [
  "fj-math",
 ]
 
 [[package]]
 name = "fj-kernel"
-version = "0.39.0"
+version = "0.40.0"
 dependencies = [
  "anyhow",
  "fj-interop",
@@ -1117,7 +1117,7 @@ dependencies = [
 
 [[package]]
 name = "fj-math"
-version = "0.39.0"
+version = "0.40.0"
 dependencies = [
  "approx 0.5.1",
  "decorum",
@@ -1130,7 +1130,7 @@ dependencies = [
 
 [[package]]
 name = "fj-operations"
-version = "0.39.0"
+version = "0.40.0"
 dependencies = [
  "fj",
  "fj-interop",
@@ -1142,7 +1142,7 @@ dependencies = [
 
 [[package]]
 name = "fj-proc"
-version = "0.39.0"
+version = "0.40.0"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1152,7 +1152,7 @@ dependencies = [
 
 [[package]]
 name = "fj-viewer"
-version = "0.39.0"
+version = "0.40.0"
 dependencies = [
  "bytemuck",
  "chrono",
@@ -1173,7 +1173,7 @@ dependencies = [
 
 [[package]]
 name = "fj-window"
-version = "0.39.0"
+version = "0.40.0"
 dependencies = [
  "crossbeam-channel",
  "egui-winit",
diff --git a/Cargo.toml b/Cargo.toml
index dd993a25e..8289d6c3f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,7 +40,7 @@ default-members = [
 
 
 [workspace.package]
-version = "0.39.0"
+version = "0.40.0"
 edition = "2021"
 
 description = """\
@@ -56,41 +56,41 @@ categories = ["encoding", "mathematics", "rendering"]
 
 
 [workspace.dependencies.fj]
-version = "0.39.0"
+version = "0.40.0"
 path = "crates/fj"
 
 [workspace.dependencies.fj-export]
-version = "0.39.0"
+version = "0.40.0"
 path = "crates/fj-export"
 
 [workspace.dependencies.fj-host]
-version = "0.39.0"
+version = "0.40.0"
 path = "crates/fj-host"
 
 [workspace.dependencies.fj-interop]
-version = "0.39.0"
+version = "0.40.0"
 path = "crates/fj-interop"
 
 [workspace.dependencies.fj-kernel]
-version = "0.39.0"
+version = "0.40.0"
 path = "crates/fj-kernel"
 
 [workspace.dependencies.fj-math]
-version = "0.39.0"
+version = "0.40.0"
 path = "crates/fj-math"
 
 [workspace.dependencies.fj-operations]
-version = "0.39.0"
+version = "0.40.0"
 path = "crates/fj-operations"
 
 [workspace.dependencies.fj-proc]
-version = "0.39.0"
+version = "0.40.0"
 path = "crates/fj-proc"
 
 [workspace.dependencies.fj-viewer]
-version = "0.39.0"
+version = "0.40.0"
 path = "crates/fj-viewer"
 
 [workspace.dependencies.fj-window]
-version = "0.39.0"
+version = "0.40.0"
 path = "crates/fj-window"