diff --git a/lodepng.cpp b/lodepng.cpp
index 2b12fb57..ee7aa7dc 100644
--- a/lodepng.cpp
+++ b/lodepng.cpp
@@ -3785,7 +3785,7 @@ unsigned lodepng_get_color_profile(LodePNGColorProfile* profile,
     for(i = 0; i < profile->numcolors; i++)
     {
       const unsigned char* color = &profile->palette[i * 4];
-      color_tree_add(&tree, color[0], color[1], color[2], color[3], i);
+      color_tree_add(&tree, color[0], color[1], color[2], color[3], static_cast<unsigned>(i));
     }
   }
 
@@ -4840,7 +4840,7 @@ static unsigned readChunk_iCCP(LodePNGInfo* info, const LodePNGDecompressSetting
                           (unsigned char*)(&data[string2_begin]),
                           length, zlibsettings);
   if(!error) {
-    info->iccp_profile_size = decoded.size;
+    info->iccp_profile_size = static_cast<unsigned>(decoded.size);
     info->iccp_profile = (unsigned char*)lodepng_malloc(decoded.size);
     if(info->iccp_profile) {
       memcpy(info->iccp_profile, decoded.data, decoded.size);