diff --git a/CHANGELOG.md b/CHANGELOG.md
index 758b173..761287b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,11 @@
 **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.
 
+# 0.3.2
+
+- **Polish**
+  - upgrade to latest fp-ts (0.4.3) (@gcanti)
+
 # 0.3.1
 
 - **New Feature**
diff --git a/package.json b/package.json
index b3cba43..363b739 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "monocle-ts",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "description": "A porting of scala monocle library to TypeScript",
   "files": ["lib"],
   "main": "lib/index.js",
@@ -26,7 +26,7 @@
   },
   "homepage": "https://github.com/gcanti/monocle-ts",
   "dependencies": {
-    "fp-ts": "^0.4.0"
+    "fp-ts": "^0.4.3"
   },
   "devDependencies": {
     "@types/mocha": "^2.2.38",
diff --git a/src/index.ts b/src/index.ts
index 5a39922..e1de92f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -675,15 +675,3 @@ export class Ops {
 const ops = new Ops()
 export const fromTraversable: Ops['fromTraversable'] = ops.fromTraversable
 export const fromFoldable: Ops['fromFoldable'] = ops.fromFoldable
-
-//
-// overloadings
-//
-
-import { ArrayURI } from 'fp-ts/lib/overloadings'
-
-export interface Ops {
-  fromTraversable<A>(T: Traversable<ArrayURI>): Traversal<Array<A>, A>
-
-  fromFoldable<A>(F: Foldable<ArrayURI>): Fold<Array<A>, A>
-}
diff --git a/test/Iso.ts b/test/Iso.ts
index c24d825..174bdcc 100644
--- a/test/Iso.ts
+++ b/test/Iso.ts
@@ -2,6 +2,7 @@ import { Iso } from '../src'
 import * as assert from 'assert'
 
 const mTokm = new Iso<number, number>(m => m / 1000, km => km * 1000)
+const kmToMile = new Iso<number, number>(km => km * 0.621371, mile => mile / 0.621371)
 
 describe('Iso', () => {
   it('get', () => {
@@ -16,4 +17,8 @@ describe('Iso', () => {
     const double = (x: number) => x * 2
     assert.strictEqual(mTokm.modify(double, 1000), 2000)
   })
+
+  it('compose', () => {
+    assert.strictEqual(mTokm.compose(kmToMile).get(1500).toFixed(2), '0.93')
+  })
 })