diff --git a/rustdesk-server.spec b/rustdesk-server.spec
index fed7eb7..4b9792f 100644
--- a/rustdesk-server.spec
+++ b/rustdesk-server.spec
@@ -49,8 +49,8 @@ rm -rf libs/hbb_common/*
 tar -xzf %{SOURCE1} -C libs/hbb_common --strip-components=1
 
 %build
-ulimit -s 16384
-cargo build --release -j 1
+ulimit -s 32768
+cargo build --release
 
 %install
 mkdir -p %{buildroot}%{_bindir}