diff --git a/Dockerfile b/Dockerfile
index 4806b92..2afec2d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM  ubuntu:focal AS build-env
+FROM  ubuntu:bionic AS build-env
 RUN apt-get update &&  DEBIAN_FRONTEND="noninteractive" \
     apt-get --yes --no-install-recommends install \
     wget \