diff --git a/build.sh b/build.sh
index 326e1bf5b..1c7bbe24d 100755
--- a/build.sh
+++ b/build.sh
@@ -259,6 +259,7 @@ if [[ $n -eq 1 ]] ; then
     echo "First build directory: $active_build_dir"
 else
     echo "N. New build (N key)"
+    echo "U. Update Visual Studio/Windows Kit/macOS SDK version (U key)"
     read -p "Select an option or number to build? " build_n
 
     # New build
@@ -277,7 +278,37 @@ else
             new_build_name=$REPLY
         fi
         active_build_dir="$builds_dir/$new_build_name"
-    else
+
+    # Update SDK
+    elif [[ "$build_n" == "u" || "$build_n" == "U" ]] ; then
+        echo "Update SDK dirs..."
+        if [ $is_win ] ; then
+            newclver=$(echo $VCToolsInstallDir | sed -e 's_^.*\\\([0-9\.]*\)\\$_\1_')
+
+            function update_file {
+                file=$1
+                echo "--- Updating $file ---" | tee -a "$pwd/.build/log"
+                mv "$file" "$file-old"
+                cat "$file-old" | sed -e 's_^\(.*/VC/Tools/MSVC/\)\([0-9\.]*\)\(.*$\)_\1'$newclver'\3_' > "$file"
+                diff -w -u3 "$file-old" "$file" >> "$pwd/.build/log"
+                echo "--- End $file ---" >> "$pwd/.build/log"
+            }
+
+            echo "New VC version: $newclver"
+            for file in $(cat $builds_list) ; do
+                build_dir=$(dirname $file)
+                echo "--- Updating $build_dir ---"
+                update_file "$file"
+                for other_file in "$build_dir/CMakeFiles/rules.ninja" \
+                                  "$build_dir/third_party/libpng/scripts/genout.cmake" ; do
+                    update_file "$other_file"
+                done
+            done
+        fi
+        echo "Done"
+        exit
+
+    else # Build the selected dir
         n=1
         for file in $(cat $builds_list) ; do
             if [ "$n" == "$build_n" ] ; then
@@ -452,13 +483,13 @@ if [ ! -f "$active_build_dir/ninja.build" ] ; then
          -DLAF_BACKEND=skia \
          -DSKIA_DIR="$skia_dir" \
          -DSKIA_LIBRARY_DIR="$skia_library_dir" | \
-            tee "$pwd/.build/log" ; then
+            tee -a "$pwd/.build/log" ; then
         echo "Error running cmake."
         exit 1
     fi
 fi
 echo "============================== BUILDING =============================="
-if ! cmake --build "$active_build_dir" -- aseprite | tee "$pwd/.build/log" ; then
+if ! cmake --build "$active_build_dir" -- aseprite | tee -a "$pwd/.build/log" ; then
     echo "Error building Aseprite."
     exit 1
 fi
diff --git a/laf b/laf
index a1c113aaa..c6cd70ad9 160000
--- a/laf
+++ b/laf
@@ -1 +1 @@
-Subproject commit a1c113aaa63ccf1e83024e283988e14da3ffba4d
+Subproject commit c6cd70ad9743197a05c7af5b5dd4c71ea61926f3