diff --git a/ChangeLog b/ChangeLog
index 451b8f6..584ed1f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,8 @@
 
+NEXT.VERSION
+
+  ...nothing yet...
+
 0.12
 
   * Address security issues:
diff --git a/Doxyfile b/Doxyfile
index cf52c48..da39aca 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -23,7 +23,7 @@ PROJECT_NAME           = json-c
 # This could be handy for archiving the generated documentation or 
 # if some version control system is used.
 
-PROJECT_NUMBER         = 0.11.99
+PROJECT_NUMBER         = 0.12.99
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) 
 # base path where the generated documentation will be put. 
diff --git a/RELEASE_CHECKLIST.txt b/RELEASE_CHECKLIST.txt
index 0bb2b77..e8702e6 100644
--- a/RELEASE_CHECKLIST.txt
+++ b/RELEASE_CHECKLIST.txt
@@ -18,7 +18,7 @@ Make any fixes/changes *before* branching.
 
 Update the version in json_c_version.h
 Update the version in Doxyfile
-Update the version in configure.in
+Update the version in configure.ac
 	Use ${release}.
 
 Update the libjson_la_LDFLAGS line in Makefile.am to the new version.
@@ -85,7 +85,7 @@ git checkout master
 Add new section to ChangeLog
 Update the version in json_c_version.h
 Update the version in Doxyfile
-Update the version in configure.in
+Update the version in configure.ac
     Use ${release}.99 to indicate a version "newer" than anything on the branch.
 
 Leave the libjson_la_LDFLAGS line in Makefile.am alone.
diff --git a/configure.ac b/configure.ac
index 48c8e5f..c50f81b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 AC_PREREQ(2.52)
 
 # Process this file with autoconf to produce a configure script.
-AC_INIT([json-c], 0.11.99, [json-c@googlegroups.com])
+AC_INIT([json-c], 0.12.99, [json-c@googlegroups.com])
 
 AM_INIT_AUTOMAKE
 
diff --git a/json_c_version.h b/json_c_version.h
index 5d3db8f..d77f1a7 100644
--- a/json_c_version.h
+++ b/json_c_version.h
@@ -9,12 +9,12 @@
 #define _json_c_version_h_
 
 #define JSON_C_MAJOR_VERSION 0
-#define JSON_C_MINOR_VERSION 11
+#define JSON_C_MINOR_VERSION 12
 #define JSON_C_MICRO_VERSION 99
 #define JSON_C_VERSION_NUM ((JSON_C_MAJOR_VERSION << 16) | \
                             (JSON_C_MINOR_VERSION << 8) | \
                             JSON_C_MICRO_VERSION)
-#define JSON_C_VERSION "0.11.99"
+#define JSON_C_VERSION "0.12.99"
 
 const char *json_c_version(void); /* Returns JSON_C_VERSION */
 int json_c_version_num(void);     /* Returns JSON_C_VERSION_NUM */