diff --git a/build.sh b/build.sh
index aed2807..87fb93e 100755
--- a/build.sh
+++ b/build.sh
@@ -4,22 +4,22 @@ rootdir=/opt/tor_static
 #build zlib
 cd $rootdir/zlib/repo/
 `cat ../config`
-make && make install
+make -j $(nproc) && make install
 
 #build libevent
 cd $rootdir/libevent/repo/
 ./autogen.sh
 `cat ../config`
-make && make install
+make -j $(nproc) && make install
 
 #build openssl
 cd $rootdir/openssl/repo/
 ./autogen.sh
 `cat ../config`
-make && make install
+make -j $(nproc) && make install
 
 #build static tor
 cd $rootdir/tor
 ./autogen.sh
 `cat ../config`
-make && make install
+make -j $(nproc) && make install