diff --git a/CHANGELOG.md b/CHANGELOG.md
index a3be39d..d75c98f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2020-11-13
+
+### Changed
+
+- Major overhaul of the Markdown templating engine: replace Handlebars with
+  template literals & functional core
+
 ## [0.3.0] - 2020-01-02
 
 ### Added
@@ -40,7 +47,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - First release.
 
-[unreleased]: https://github.com/fredericbonnet/seaborg/compare/v0.3.0...HEAD
+[unreleased]: https://github.com/fredericbonnet/seaborg/compare/v0.4.0...HEAD
+[0.4.0]: https://github.com/fredericbonnet/seaborg/compare/v0.3.0...v0.4.0
 [0.3.0]: https://github.com/fredericbonnet/seaborg/compare/v0.2.1...v0.3.0
 [0.2.1]: https://github.com/fredericbonnet/seaborg/compare/v0.2.0...v0.2.1
 [0.2.0]: https://github.com/fredericbonnet/seaborg/compare/v0.1.1...v0.2.0
diff --git a/lerna.json b/lerna.json
index 3ac0750..c0a3988 100644
--- a/lerna.json
+++ b/lerna.json
@@ -4,5 +4,5 @@
     "packages/core",
     "packages/markdown"
   ],
-  "version": "0.3.0"
+  "version": "0.4.0"
 }
diff --git a/packages/cli/package-lock.json b/packages/cli/package-lock.json
index 5726481..92239d8 100644
--- a/packages/cli/package-lock.json
+++ b/packages/cli/package-lock.json
@@ -1,6 +1,6 @@
 {
 	"name": "@seaborg/cli",
-	"version": "0.3.0",
+	"version": "0.4.0",
 	"lockfileVersion": 1,
 	"requires": true,
 	"dependencies": {
diff --git a/packages/cli/package.json b/packages/cli/package.json
index a0cc0b2..f530d62 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@seaborg/cli",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Seaborg command line interface",
   "author": "Frédéric Bonnet <fredericbonnet@free.fr>",
   "homepage": "https://github.com/fredericbonnet/seaborg#readme",
@@ -25,8 +25,8 @@
     "url": "https://github.com/fredericbonnet/seaborg/issues"
   },
   "dependencies": {
-    "@seaborg/core": "^0.3.0",
-    "@seaborg/markdown": "^0.3.0",
+    "@seaborg/core": "^0.4.0",
+    "@seaborg/markdown": "^0.4.0",
     "comlink": "^4.2.0",
     "commander": "^4.0.1"
   }
diff --git a/packages/core/package-lock.json b/packages/core/package-lock.json
index 8353ef2..a198e53 100644
--- a/packages/core/package-lock.json
+++ b/packages/core/package-lock.json
@@ -1,6 +1,6 @@
 {
 	"name": "@seaborg/core",
-	"version": "0.3.0",
+	"version": "0.4.0",
 	"lockfileVersion": 1,
 	"requires": true,
 	"dependencies": {
diff --git a/packages/core/package.json b/packages/core/package.json
index daf6622..2c9e78e 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@seaborg/core",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Seaborg core library",
   "author": "Frédéric Bonnet <fredericbonnet@free.fr>",
   "homepage": "https://github.com/fredericbonnet/seaborg#readme",
diff --git a/packages/markdown/package-lock.json b/packages/markdown/package-lock.json
index e95e18f..76c5700 100644
--- a/packages/markdown/package-lock.json
+++ b/packages/markdown/package-lock.json
@@ -1,6 +1,6 @@
 {
 	"name": "@seaborg/markdown",
-	"version": "0.3.0",
+	"version": "0.4.0",
 	"lockfileVersion": 1,
 	"requires": true,
 	"dependencies": {
diff --git a/packages/markdown/package.json b/packages/markdown/package.json
index 446801e..22f5d37 100644
--- a/packages/markdown/package.json
+++ b/packages/markdown/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@seaborg/markdown",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Seaborg Markdown templates",
   "author": "Frédéric Bonnet <fredericbonnet@free.fr>",
   "homepage": "https://github.com/fredericbonnet/seaborg#readme",
@@ -30,6 +30,6 @@
   },
   "dependencies": {
     "@rgrove/parse-xml": "^2.0.1",
-    "@seaborg/core": "^0.3.0"
+    "@seaborg/core": "^0.4.0"
   }
 }