diff --git a/Dockerfile b/Dockerfile
index d7989c3..ff0fea3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -99,7 +99,9 @@ WORKDIR /x-mingw-crt
 RUN /mingw-w64-v$MINGW_VERSION/mingw-w64-crt/configure \
         --prefix=/bootstrap/x86_64-w64-mingw32 \
         --with-sysroot=/bootstrap/x86_64-w64-mingw32 \
-        --host=x86_64-w64-mingw32
+        --host=x86_64-w64-mingw32 \
+        CFLAGS="-Os" \
+        LDFLAGS="-s"
 RUN make -j$(nproc)
 RUN make install