diff --git a/tools/optimize-assets.sh b/tools/optimize-assets.sh
index e522265a6f..598052b70c 100755
--- a/tools/optimize-assets.sh
+++ b/tools/optimize-assets.sh
@@ -2,4 +2,6 @@
 # SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
 # SPDX-License-Identifier: GPL-3.0-or-later
 which optipng || exit
-find . -type f -iname '*.png' -print0 | xargs -0 -P 16 -I {} optipng -o7 {}
+NPROC=$(nproc)
+[ -z "$NPROC" ] && NPROC=8
+find . -type f -iname '*.png' | xargs -P $NPROC -I {} optipng -o7 {}