diff --git a/.gitignore b/.gitignore
index ccf4f25..ea09d48 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ testcpp
 tests/test_2_serialized.txt
 tests/test_2_serialized_pretty.txt
 test_hash_collisions
+build/**
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6945b44..4e1cf6d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ project(parson C)
 
 include (GNUInstallDirs)
 
-set(PARSON_VERSION 1.3.0)
+set(PARSON_VERSION 1.3.1)
 add_library(parson parson.c)
 target_include_directories(parson PUBLIC $<INSTALL_INTERFACE:include>)
 
diff --git a/package.json b/package.json
index 5d0b930..62fd31e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "parson",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "repo": "kgabis/parson",
   "description": "Small json parser and reader",
   "keywords": [ "json", "parser" ],
diff --git a/parson.c b/parson.c
index 8406aab..5a78118 100644
--- a/parson.c
+++ b/parson.c
@@ -1,7 +1,7 @@
 /*
  SPDX-License-Identifier: MIT
 
- Parson 1.3.0 (https://github.com/kgabis/parson)
+ Parson 1.3.1 (https://github.com/kgabis/parson)
  Copyright (c) 2012 - 2022 Krzysztof Gabis
 
  Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -32,7 +32,7 @@
 
 #define PARSON_IMPL_VERSION_MAJOR 1
 #define PARSON_IMPL_VERSION_MINOR 3
-#define PARSON_IMPL_VERSION_PATCH 0
+#define PARSON_IMPL_VERSION_PATCH 1
 
 #if (PARSON_VERSION_MAJOR != PARSON_IMPL_VERSION_MAJOR)\
 || (PARSON_VERSION_MINOR != PARSON_IMPL_VERSION_MINOR)\
@@ -596,7 +596,7 @@ static JSON_Status json_object_add(JSON_Object *object, char *name, JSON_Value *
 static JSON_Value * json_object_getn_value(const JSON_Object *object, const char *name, size_t name_len) {
     unsigned long hash = 0;
     parson_bool_t found = PARSON_FALSE;
-    unsigned long cell_ix = 0;
+    size_t cell_ix = 0;
     size_t item_ix = 0;
     if (!object || !name) {
         return NULL;
diff --git a/parson.h b/parson.h
index 7bbfa52..bba4659 100644
--- a/parson.h
+++ b/parson.h
@@ -1,7 +1,7 @@
 /*
  SPDX-License-Identifier: MIT
 
- Parson 1.3.0 (https://github.com/kgabis/parson)
+ Parson 1.3.1 (https://github.com/kgabis/parson)
  Copyright (c) 2012 - 2022 Krzysztof Gabis
 
  Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -36,9 +36,9 @@ extern "C"
 
 #define PARSON_VERSION_MAJOR 1
 #define PARSON_VERSION_MINOR 3
-#define PARSON_VERSION_PATCH 0
+#define PARSON_VERSION_PATCH 1
 
-#define PARSON_VERSION_STRING "1.3.0"
+#define PARSON_VERSION_STRING "1.3.1"
 
 #include <stddef.h>   /* size_t */