diff --git a/install.sh b/install.sh
index 9d4934f..fc774f4 100644
--- a/install.sh
+++ b/install.sh
@@ -5,7 +5,7 @@ set -e
 ADVCPMV_VERSION=${1:-0.9}
 CORE_UTILS_VERSION=${2:-9.5}
 
-curl -LO http://ftp.gnu.org/gnu/coreutils/coreutils-$CORE_UTILS_VERSION.tar.xz
+curl -LO https://ftp.gnu.org/gnu/coreutils/coreutils-$CORE_UTILS_VERSION.tar.xz
 tar xvJf coreutils-$CORE_UTILS_VERSION.tar.xz
 rm coreutils-$CORE_UTILS_VERSION.tar.xz
 (