diff --git a/Dockerfile b/Dockerfile
index 2a988bf..b4e9ea2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:18.04
 
 RUN apt-get update && apt-get install -y \
     ca-certificates \
diff --git a/README.md b/README.md
index 7cd8b69..5ce43c0 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,7 @@ Then run it with:
 
 ### Docker image
 
-asciinema Docker image is based on Ubuntu 16.04 and has the latest version of
+asciinema Docker image is based on Ubuntu 18.04 and has the latest version of
 asciinema recorder pre-installed.
 
     docker pull asciinema/asciinema