diff --git a/CHANGES.md b/CHANGES.md
index 3cb293f4..8ebed624 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,7 +1,7 @@
 ### 0.10.0 (2015-xx-xx xx:xx:xx UTC)
 
 * Remove EZRSS provider
-* Update Tornado webserver to 4.2b1 (61a16c9)
+* Update Tornado webserver to 4.2 (fdfaf3d)
 * Update change to suppress reporting of Tornado exception error 1 to updated package (ref:hacks.txt)
 * Update fix for API response header for JSON content type and the return of JSONP data to updated package (ref:hacks.txt)
 * Update Requests library 2.6.2 to 2.7.0 (8b5e457)
@@ -22,6 +22,7 @@
 
 [develop changelog]
 * Update Requests library 2.7.0 (ab1f493) to 2.7.0 (8b5e457)
+* Update Tornado webserver from 4.2.dev1 (609dbb9) to 4.2b1 (61a16c9)
 
 
 ### 0.9.1 (2015-05-25 03:03:00 UTC)
diff --git a/tornado/__init__.py b/tornado/__init__.py
index 80f21ddd..29e87041 100644
--- a/tornado/__init__.py
+++ b/tornado/__init__.py
@@ -25,5 +25,5 @@ from __future__ import absolute_import, division, print_function, with_statement
 # is zero for an official release, positive for a development branch,
 # or negative for a release candidate or beta (after the base version
 # number has been incremented)
-version = "4.2b1"
-version_info = (4, 2, 0, -99)
+version = "4.2"
+version_info = (4, 2, 0, 0)
diff --git a/tornado/httputil.py b/tornado/httputil.py
index f5fea213..fa5e697c 100644
--- a/tornado/httputil.py
+++ b/tornado/httputil.py
@@ -394,7 +394,7 @@ class HTTPServerRequest(object):
         """
         assert isinstance(chunk, bytes)
         assert self.version.startswith("HTTP/1."), \
-            "deprecated interface ony supported in HTTP/1.x"
+            "deprecated interface only supported in HTTP/1.x"
         self.connection.write(chunk, callback=callback)
 
     def finish(self):