diff --git a/ci/before_deploy.sh b/ci/before_deploy.sh
index 689a534..04f1d4a 100755
--- a/ci/before_deploy.sh
+++ b/ci/before_deploy.sh
@@ -81,7 +81,7 @@ mk_tarball() {
 
     if is_windows; then
         (cd "$tmpdir" && download_other_binaries "$name")
-        (cd "$tmpdir" && zip -r "$out_dir/$name.zip" "$name")
+        (cd "$tmpdir" && 7za a "$out_dir/$name.7z" "$name")
     else
         (cd "$tmpdir" && tar czf "$out_dir/$name.tar.gz" "$name")
     fi