diff --git a/PixelAttributes.h b/PixelAttributes.h
index 959f55b..bdaaa2e 100644
--- a/PixelAttributes.h
+++ b/PixelAttributes.h
@@ -12,7 +12,7 @@
 
 #include <limits>
 #include <cmath>
-#include <stdint.h>
+#include <cstdint>
 #include <stdexcept>
 #include <cassert>
 #include "config.h"
diff --git a/TileGenerator.h b/TileGenerator.h
index 9a40c8a..b7d37ca 100644
--- a/TileGenerator.h
+++ b/TileGenerator.h
@@ -21,7 +21,7 @@
 #endif
 #include <set>
 #include <list>
-#include <stdint.h>
+#include <cstdint>
 #include <string>
 #include <iostream>
 #include <sstream>
diff --git a/ZlibDecompressor.cpp b/ZlibDecompressor.cpp
index 67da774..3e2110e 100644
--- a/ZlibDecompressor.cpp
+++ b/ZlibDecompressor.cpp
@@ -8,7 +8,7 @@
  */
 
 #include <zlib.h>
-#include <stdint.h>
+#include <cstdint>
 #include "ZlibDecompressor.h"
 
 ZlibDecompressor::ZlibDecompressor(const unsigned char *data, std::size_t size):
diff --git a/db.h b/db.h
index 47b3087..4c74876 100644
--- a/db.h
+++ b/db.h
@@ -1,7 +1,7 @@
 #ifndef _DB_H
 #define _DB_H
 
-#include <stdint.h>
+#include <cstdint>
 #include <vector>
 #include <string>
 #include <utility>