diff --git a/CMakeLists.txt b/CMakeLists.txt
index 218c3d7..a579762 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.0)
 set(CFLTK_PROJECT_VERSION 1.4.30)
 
 project(
diff --git a/src/cfl_group.cpp b/src/cfl_group.cpp
index ec658d7..bcdc9c3 100644
--- a/src/cfl_group.cpp
+++ b/src/cfl_group.cpp
@@ -1242,7 +1242,7 @@ const unsigned Fl_Terminal_Utf8Char_size(void) {
 GROUP_DEFINE(Fl_Terminal)
 
 
-#include <malloc.h>
+#include <stdlib.h>
 // Free up string that was allocated in C++
 void Fl_free_str(const char *str) {
     if (str) free((void *) str);