diff --git a/Dockerfile b/Dockerfile
index b8ba9ce..f8fa517 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:xenial-20210114
 RUN apt-get -y update && apt-get install -y \
   libgmp3-dev
 COPY .stack-work/install/x86_64-linux-dkda49f7ca9b244180d3cfb1987cbc9743/lts-13.16/8.6.4/bin/extravagance /bin/