diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index aab60de..a5c1620 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -128,7 +128,7 @@ jobs:
           echo "CC=$(xcrun --find cc)" >> $GITHUB_ENV
           echo "CXX=$(xcrun --find c++)" >> $GITHUB_ENV
           echo "CPP=$(xcrun --find cc) -E" >> $GITHUB_ENV
-          echo "CFLAGS=-g -Os -arch ${{ matrix.arch }} -m${{ matrix.os }}-version-min=${{ matrix.minos }} -isysroot ${{ env.SDK }} -isystem $(pwd)/sysroot/usr/local/include -Os" >> $GITHUB_ENV
+          echo "CFLAGS=-g -Os -arch ${{ matrix.arch }} -m${{ matrix.os }}-version-min=${{ matrix.minos }} -isysroot ${{ env.SDK }} -isystem $(pwd)/sysroot/usr/local/include -Os -g -flto=full -Wl,-object_path_lto,lto.o" >> $GITHUB_ENV
           echo "CPPFLAGS=-g -Os -arch ${{ matrix.arch }} -m${{ matrix.os }}-version-min=${{ matrix.minos }} -isysroot ${{ env.SDK }} -isystem $(pwd)/sysroot/usr/local/include -Wno-error-implicit-function-declaration -Os" >> $GITHUB_ENV
           echo "CXXFLAGS=-stdlib=libc++ -g -Os -isysroot ${{ env.SDK }} -arch ${{ matrix.arch }} -m${{ matrix.os }}-version-min=${{ matrix.minos }} -isystem $(pwd)/sysroot/usr/local/include -Os" >> $GITHUB_ENV
           echo "LDFLAGS=-g -Wl,-dead_strip -arch ${{ matrix.arch }} -isysroot ${{ env.SDK }} -m${{ matrix.os }}-version-min=${{ matrix.minos }} -L$(pwd)/sysroot/usr/local/lib" >> $GITHUB_ENV
diff --git a/src/Makefile b/src/Makefile
index 8aa1925..2c7d4fd 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -52,6 +52,9 @@ OBJECTS += usb_iokit.o
 else
 LIBS += -framework SystemConfiguration -framework Security
 endif
+# add lto and debug symbols for lto
+CFLAGS += -flto=full -g
+LDFLAGS += -Wl,-object_path_lto,lto.o
 else
 USE_LIBUSB = 1
 endif