diff --git a/build.sh b/build.sh
index c3d3f10..198dee7 100755
--- a/build.sh
+++ b/build.sh
@@ -115,7 +115,7 @@ function downloadAndCompile {
 downloadAndCompile lbzip2-2.5 http://archive.lbzip2.org/lbzip2-2.5.tar.gz
 downloadAndCompile gperf-3.1 http://ftp.gnu.org/pub/gnu/gperf/gperf-3.1.tar.gz
 downloadAndCompile libiconv-1.15 https://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.15.tar.gz "--with-gperf=$INSTALLDIR"
-downloadAndCompile expat-2.2.0 http://starbutterfly.sydneyerickson.me/expat-2.2.0.tar.bz2 "--with-lbzip2=$INSTALLDIR"
+downloadAndCompile expat-2.2.0 https://starbutterfly.sydneyerickson.me/expat-2.2.0.tar.bz2 "--with-lbzip2=$INSTALLDIR"
 downloadAndCompile ncurses-6.0 https://ftp.gnu.org/gnu/ncurses/ncurses-6.0.tar.gz
 downloadAndCompile gettext-0.19.8.1 https://ftp.gnu.org/pub/gnu/gettext/gettext-0.19.8.1.tar.gz "--with-expat=$INSTALLDIR --with-libiconv=$INSTALLDIR --with-ncurses=$INSTALLDIR"
 downloadAndCompile xz-5.2.3 http://tukaani.org/xz/xz-5.2.3.tar.gz "--with-lbzip2=$INSTALLDIR --with-libiconv=$INSTALLDIR --with-gettext=$INSTALLDIR"