diff --git a/install_orbit_environment.sh b/install_orbit_environment.sh
index bb6af9e..384f1d1 100644
--- a/install_orbit_environment.sh
+++ b/install_orbit_environment.sh
@@ -321,7 +321,7 @@ if [ -z $(which convert) ]; then
 	tar xvfz libpng-1.5.13.tar.gz && \
 	cd libpng-1.5.13/ && \
 	./configure && \
-	make && sudo make install && \
+	make -j $(nproc) && sudo make install && \
 	apt install -y libltdl-dev graphviz libpng-dev libfftw3-dev && \
 	apt-get install -y libjpeg-turbo8-dev && \
 	apt install -y libgif-dev libjpeg-dev libopenexr-dev libpng-dev libwebp-dev && \
@@ -330,7 +330,7 @@ if [ -z $(which convert) ]; then
 	tar xfz ImageMagick.tar.gz && \
 	cd /root/libpng-1.5.13/ImageMagick-7* && \
 	./configure --with-bzlib=yes --with-fontconfig=yes --with-freetype=yes --with-gslib=yes --with-gvc=yes --with-jpeg=yes --with-jp2=yes --with-png=yes --with-tiff=yes --disable-shared --with-modules && \
-	make && make install && \
+	make -j $(nproc) && make install && \
 	ln -s /usr/local/lib/* /usr/lib/. && \
 	ln -s /usr/local/lib/pkgconfig/* /usr/lib/pkgconfig/. && \
 	ln -s /usr/local/bin/* /usr/bin/. && \