diff --git a/NEWS b/NEWS
index 3025112..5b39743 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,15 @@
+== 9 Dec 2017 ==
+gperftools 2.6.3 is out!
+
+Just two fixes were made in this release:
+
+* Stephan Zuercher has contributed a build fix for some recent XCode
+  versions. See issue #942 for more details.
+
+* assertion failure on some windows builds introduced by 2.6.2 was
+  fixed. Thanks to github user nkeemik for reporting it and testing
+  fix. See issue #944 for more details.
+
 == 30 Nov 2017 ==
 gperftools 2.6.2 is out!
 
diff --git a/configure.ac b/configure.ac
index f2ae799..24f298b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,11 +4,11 @@
 # make sure we're interpreted by some minimal autoconf
 AC_PREREQ([2.59])
 
-AC_INIT([gperftools],[2.6.2],[gperftools@googlegroups.com])
+AC_INIT([gperftools],[2.6.3],[gperftools@googlegroups.com])
 # Update this value for every release!  (A:B:C will map to foo.so.(A-C).C.B)
 # http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-TCMALLOC_SO_VERSION=9:0:5
-PROFILER_SO_VERSION=4:15:4
+TCMALLOC_SO_VERSION=9:1:5
+PROFILER_SO_VERSION=4:16:4
 
 AC_SUBST(TCMALLOC_SO_VERSION)
 AC_SUBST(PROFILER_SO_VERSION)
diff --git a/src/windows/config.h b/src/windows/config.h
index 0db7e93..b269369 100644
--- a/src/windows/config.h
+++ b/src/windows/config.h
@@ -236,7 +236,7 @@
 #define PACKAGE_NAME "gperftools"
 
 /* Define to the full name and version of this package. */
-#define PACKAGE_STRING "gperftools 2.6.2"
+#define PACKAGE_STRING "gperftools 2.6.3"
 
 /* Define to the one symbol short name of this package. */
 #define PACKAGE_TARNAME "gperftools"
@@ -245,7 +245,7 @@
 #undef PACKAGE_URL
 
 /* Define to the version of this package. */
-#define PACKAGE_VERSION "2.6.2"
+#define PACKAGE_VERSION "2.6.3"
 
 /* How to access the PC from a struct ucontext */
 #undef PC_FROM_UCONTEXT
diff --git a/src/windows/gperftools/tcmalloc.h b/src/windows/gperftools/tcmalloc.h
index 643d2e8..e517fb4 100644
--- a/src/windows/gperftools/tcmalloc.h
+++ b/src/windows/gperftools/tcmalloc.h
@@ -44,8 +44,8 @@
 /* Define the version number so folks can check against it */
 #define TC_VERSION_MAJOR  2
 #define TC_VERSION_MINOR  6
-#define TC_VERSION_PATCH  ".2"
-#define TC_VERSION_STRING "gperftools 2.6.2"
+#define TC_VERSION_PATCH  ".3"
+#define TC_VERSION_STRING "gperftools 2.6.3"
 
 #ifndef PERFTOOLS_NOTHROW