Bump version to v0.6.6 (#576)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6544507..561fd76 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+# 0.6.6 (March 22, 2017)
+
+* Add send(), recv() and connect() to UDPSocket.
+* Fix bug in custom readiness queue
+* Move net types into `net` module
+
 # 0.6.5 (March 14, 2017)
 
 * Misc improvements to kqueue bindings
diff --git a/Cargo.toml b/Cargo.toml
index 11b9de6..71cf569 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 
 name          = "mio"
-version       = "0.6.5"
+version       = "0.6.6"
 license       = "MIT"
 authors       = ["Carl Lerche <me@carllerche.com>"]
 description   = "Lightweight non-blocking IO"