diff --git a/packages/rpm.sh b/packages/rpm.sh
index 50789fa..23ed777 100644
--- a/packages/rpm.sh
+++ b/packages/rpm.sh
@@ -13,7 +13,7 @@ RPM_INSTALL_PATH="$BUILD_PATH"/rpm-install
 TON_RELEASE=$5
 
 mkdir -p "$RPMBUILD_PATH"/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS}
-tar --create --file "$RPMBUILD_PATH"/SOURCES/ton.tar.gz --transform 's,^,ton-dev/,' -C "$NIX_RESULT_PATH" .
+tar --create --file "$RPMBUILD_PATH"/SOURCES/ton.tar.gz --transform 's,^,ton-dev/,' --options gzip:compression-level=9 -C "$NIX_RESULT_PATH" .
 
 rpmbuild --define "_topdir $RPMBUILD_PATH" \
          --define "_prefix /usr" \