diff --git a/CHANGES.md b/CHANGES.md
index 563c7dd7..904c709c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,7 +2,9 @@
 
 All notable changes to this program is documented in this file.
 
-## Unreleased
+## v0.16.0 (2016-04-21)
+
+Note that geckodriver v0.16.0 is only compatible with Selenium 3.4 and greater.
 
 ### Added
 - Support for WebDriver-conforming [New Session](https://w3c.github.io/webdriver/webdriver-spec.html#dfn-new-session) negotiation, with `desiredCapabilities`/`requiredCapabilities` negotiation as fallback
diff --git a/Cargo.lock b/Cargo.lock
index 700e48c7..5bcc2713 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,6 @@
 [root]
 name = "geckodriver"
-version = "0.15.0"
+version = "0.16.0"
 dependencies = [
  "chrono 0.2.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.23.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -11,7 +11,7 @@ dependencies = [
  "mozrunner 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "mozversion 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog-atomic 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog-stdlog 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -162,7 +162,7 @@ dependencies = [
  "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "traitobject 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -402,7 +402,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "rustc-serialize"
-version = "0.3.23"
+version = "0.3.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -626,7 +626,7 @@ version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -649,7 +649,7 @@ dependencies = [
  "hyper 0.10.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -672,7 +672,7 @@ dependencies = [
  "advapi32-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "ktmw32-sys 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -736,7 +736,7 @@ dependencies = [
 "checksum regex-syntax 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2f9191b1f57603095f105d317e375d19b1c9c5c3185ea9633a99a6dcbed04457"
 "checksum rust-ini 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "06d4e8b0b50e7e7f827d609fa9746e1cf6371a1fa15404a1a0a86152a801079f"
 "checksum rustc-demangle 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "3058a43ada2c2d0b92b3ae38007a2d0fa5e9db971be260e0171408a4ff471c95"
-"checksum rustc-serialize 0.3.23 (registry+https://github.com/rust-lang/crates.io-index)" = "684ce48436d6465300c9ea783b6b14c4361d6b8dcbb1375b486a69cc19e2dfb0"
+"checksum rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)" = "dcf128d1287d2ea9d80910b5f1120d0b8eede3fbf1abe91c40d39ea7d51e6fda"
 "checksum rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "c5f5376ea5e30ce23c03eb77cbe4962b988deead10910c372b226388b594c084"
 "checksum semver 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)" = "d4f410fedcf71af0345d7607d246e7ad15faaadd49d240ee3b24e5dc21a820ac"
 "checksum semver 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a3186ec9e65071a2095434b1f5bb24838d4e8e130f584c790f6033c79943537"
diff --git a/Cargo.toml b/Cargo.toml
index 4df2b240..066c67b1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "geckodriver"
-version = "0.15.0"
+version = "0.16.0"
 authors = [
   "James Graham <james@hoppipolla.co.uk>",
   "Andreas Tolfsen <ato@mozilla.com>",
diff --git a/README.md b/README.md
index 0aa65341..cb4977b3 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ on [supported platforms](#supported-firefoxen).
 ## Supported clients
 
 [Selenium](http://docs.seleniumhq.org/) users
-must update to [version 3.3.1](https://github.com/SeleniumHQ/selenium/releases/tag/selenium-3.3.1)
+must update to [version 3.4](https://github.com/SeleniumHQ/selenium/releases/tag/selenium-3.4.0)
 or later to use geckodriver.
 Other clients that follow the [W3C WebDriver specification](https://w3c.github.io/webdriver/webdriver-spec.html) are also supported.