diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5411be0c..80d55d2e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required (VERSION 3.9)
 
 project(maxminddb
   LANGUAGES C
-  VERSION 1.9.0
+  VERSION 1.9.1
 )
 set(MAXMINDDB_SOVERSION 0.0.7)
 set(CMAKE_C_STANDARD 99)
diff --git a/configure.ac b/configure.ac
index 53a42bd8..579d3522 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.63])
-AC_INIT([libmaxminddb], [1.9.0], [support@maxmind.com])
+AC_INIT([libmaxminddb], [1.9.1], [support@maxmind.com])
 AC_CONFIG_SRCDIR([include/maxminddb.h])
 AC_CONFIG_HEADERS([config.h include/maxminddb_config.h])