diff --git a/hicolor.h b/hicolor.h
index 3f6a864..f18f2f6 100644
--- a/hicolor.h
+++ b/hicolor.h
@@ -19,7 +19,7 @@
 #include <stdio.h>
 
 #define HICOLOR_BAYER_SIZE 8
-#define HICOLOR_LIBRARY_VERSION 301
+#define HICOLOR_LIBRARY_VERSION 400
 
 /* Types. */