diff --git a/CMakeLists.txt b/CMakeLists.txt
index b34fcbf..e2f4434 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ project(parson C)
 
 include (GNUInstallDirs)
 
-set(PARSON_VERSION 1.5.2)
+set(PARSON_VERSION 1.5.3)
 add_library(parson parson.c)
 target_include_directories(parson PUBLIC $<INSTALL_INTERFACE:include>)
 
diff --git a/Makefile b/Makefile
index 5e6bdfd..0803434 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
 CC = gcc
-CFLAGS = -O0 -g -Wall -Wextra -Wno-deprecated-declarations -std=c89 -pedantic-errors -DTESTS_MAIN
+CFLAGS = -O0 -g -Wall -Wextra -std=c89 -pedantic-errors -DTESTS_MAIN
 
 CPPC = g++
-CPPFLAGS = -O0 -g -Wall -Wextra -Wno-deprecated-declarations -DTESTS_MAIN 
+CPPFLAGS = -O0 -g -Wall -Wextra -DTESTS_MAIN 
 
 all: test testcpp test_hash_collisions
 
diff --git a/meson.build b/meson.build
index 5885a7f..ab6fb93 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('parson', 'c',
-    version : '1.5.2',
+    version : '1.5.3',
     license : 'MIT',
     meson_version : '>=0.46.0',
     default_options : [
diff --git a/package.json b/package.json
index cce306f..8267dc7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "parson",
-  "version": "1.5.2",
+  "version": "1.5.3",
   "repo": "kgabis/parson",
   "description": "Small json parser and reader",
   "keywords": [ "json", "parser" ],
diff --git a/parson.c b/parson.c
index 4a18fe9..526aab4 100644
--- a/parson.c
+++ b/parson.c
@@ -1,7 +1,7 @@
 /*
  SPDX-License-Identifier: MIT
 
- Parson 1.5.2 (https://github.com/kgabis/parson)
+ Parson 1.5.3 (https://github.com/kgabis/parson)
  Copyright (c) 2012 - 2023 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 5
-#define PARSON_IMPL_VERSION_PATCH 2
+#define PARSON_IMPL_VERSION_PATCH 3
 
 #if (PARSON_VERSION_MAJOR != PARSON_IMPL_VERSION_MAJOR)\
 || (PARSON_VERSION_MINOR != PARSON_IMPL_VERSION_MINOR)\
@@ -40,6 +40,7 @@
 #error "parson version mismatch between parson.c and parson.h"
 #endif
 
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -152,6 +153,8 @@ static char * read_file(const char *filename);
 static void   remove_comments(char *string, const char *start_token, const char *end_token);
 static char * parson_strndup(const char *string, size_t n);
 static char * parson_strdup(const char *string);
+static int    parson_sprintf(char * s, const char * format, ...);
+
 static int    hex_char_to_int(char c);
 static JSON_Status parse_utf16_hex(const char *string, unsigned int *result);
 static int         num_bytes_in_utf8_sequence(unsigned char c);
@@ -283,6 +286,25 @@ static char * parson_strdup(const char *string) {
     return parson_strndup(string, strlen(string));
 }
 
+static int parson_sprintf(char * s, const char * format, ...) {
+    int result;
+    va_list args;
+    va_start(args, format);
+    
+    #if defined(__APPLE__) && defined(__clang__)
+        #pragma clang diagnostic push
+        #pragma clang diagnostic ignored "-Wdeprecated-declarations"
+    #endif
+        result = vsprintf(s, format, args);
+    #if defined(__APPLE__) && defined(__clang__)
+        #pragma clang diagnostic pop
+    #endif
+
+    va_end(args);
+    return result;
+
+}
+
 static int hex_char_to_int(char c) {
     if (c >= '0' && c <= '9') {
         return c - '0';
@@ -1243,10 +1265,9 @@ static int json_serialize_to_buffer_r(const JSON_Value *value, char *buf, int le
             }
             if (parson_number_serialization_function) {
                 written = parson_number_serialization_function(num, num_buf);
-            } else if (parson_float_format) {
-                written = sprintf(num_buf, parson_float_format, num);
             } else {
-                written = sprintf(num_buf, PARSON_DEFAULT_FLOAT_FORMAT, num);
+                const char *float_format = parson_float_format ? parson_float_format : PARSON_DEFAULT_FLOAT_FORMAT;
+                written = parson_sprintf(num_buf, float_format, num);
             }
             if (written < 0) {
                 return -1;
diff --git a/parson.h b/parson.h
index 77b451e..40be490 100644
--- a/parson.h
+++ b/parson.h
@@ -1,7 +1,7 @@
 /*
  SPDX-License-Identifier: MIT
 
- Parson 1.5.2 (https://github.com/kgabis/parson)
+ Parson 1.5.3 (https://github.com/kgabis/parson)
  Copyright (c) 2012 - 2023 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 5
-#define PARSON_VERSION_PATCH 2
+#define PARSON_VERSION_PATCH 3
 
-#define PARSON_VERSION_STRING "1.5.2"
+#define PARSON_VERSION_STRING "1.5.3"
 
 #include <stddef.h>   /* size_t */
 
diff --git a/tests.c b/tests.c
index 60ac579..3cf97b5 100644
--- a/tests.c
+++ b/tests.c
@@ -26,6 +26,10 @@
 #define _CRT_SECURE_NO_WARNINGS
 #endif
 
+#if defined(__APPLE__) && defined(__clang__)
+    #pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 #include "parson.h"
 
 #include <assert.h>