diff --git a/build_tools/make_tarball.sh b/build_tools/make_tarball.sh
index 1e24de0f9..3e070c11f 100755
--- a/build_tools/make_tarball.sh
+++ b/build_tools/make_tarball.sh
@@ -55,4 +55,4 @@ gzip "$path"
 
 # Output what we did, and the sha1 hash
 echo "Tarball written to $path".gz
-openssl sha1 "$path".gz
+openssl dgst -sha256 "$path".gz