diff --git a/package-lock.json b/package-lock.json
index cf04bed..b2a8975 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "monocle-ts",
-  "version": "2.3.3",
+  "version": "2.3.5",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -2249,9 +2249,9 @@
       }
     },
     "fp-ts": {
-      "version": "2.6.5",
-      "resolved": "https://registry.npmjs.org/fp-ts/-/fp-ts-2.6.5.tgz",
-      "integrity": "sha512-lQNzOMJj98b623+UZLQ+tnN/8qtNXz/vRoR9k7L/9OlUIyYH3qVzSUVZBDXYsAd7nOWzzdQALCX1ZqcF70altQ==",
+      "version": "2.9.3",
+      "resolved": "https://registry.npmjs.org/fp-ts/-/fp-ts-2.9.3.tgz",
+      "integrity": "sha512-NjzcHYgigcbPQ6yJ52zwgsVDwKz3vwy9sjbxyzcvfXQm+j1BGeOPRuzLKEwsLyE4Xut6gG1FXJtsU9/gUB7tXg==",
       "dev": true
     },
     "fragment-cache": {
diff --git a/package.json b/package.json
index 3da9c64..4d2cd42 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "@types/node": "7.0.4",
     "docs-ts": "^0.5.0",
     "dtslint": "github:gcanti/dtslint",
-    "fp-ts": "^2.6.5",
+    "fp-ts": "^2.9.3",
     "import-path-rewrite": "github:gcanti/import-path-rewrite",
     "jest": "^24.3.0",
     "mocha": "^5.2.0",