diff --git a/.gitignore b/.gitignore
index e844bea2..ca597619 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,3 +44,5 @@ Makefile
 /wrjpgcom
 /yuvjpeg
 test_yuv*.jpg
+CMakeCache.txt
+CTestTestfile.cmake
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9f521513..743a243c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,7 +9,7 @@ if(POLICY CMP0022)
 endif()
 
 project(mozjpeg C)
-set(VERSION 3.3)
+set(VERSION 3.3.1)
 
 if(NOT WIN32)
   message(FATAL_ERROR "Platform not supported by this build system.  Use autotools instead.")
diff --git a/configure.ac b/configure.ac
index c999a023..0e50d0c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.56])
-AC_INIT([mozjpeg], [3.3])
+AC_INIT([mozjpeg], [3.3.1])
 BUILD=`date +%Y%m%d`
 
 AM_INIT_AUTOMAKE([-Wall foreign dist-bzip2])