diff --git a/CHANGELOG.md b/CHANGELOG.md
index 761287b..5e3ca16 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,12 @@
 **Note**: Gaps between patch versions are faulty/broken releases.
 **Note**: A feature tagged as Experimental is in a high state of flux, you're at risk of it changing without notice.
 
+# 0.4.0
+
+- **Breaking Change**
+  - upgrade to fp-ts 0.5 (@gcanti)
+  - currying of all APIs (@gcanti)
+
 # 0.3.2
 
 - **Polish**
diff --git a/package.json b/package.json
index 65217e9..ad71c57 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "monocle-ts",
-  "version": "0.3.2",
+  "version": "0.4.0",
   "description": "A porting of scala monocle library to TypeScript",
   "files": ["lib"],
   "main": "lib/index.js",