diff --git a/Dockerfile b/Dockerfile
index 9c5da07..2f5d555 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM silex/emacs:26.3-alpine-dev
+FROM silex/emacs:27.1-alpine-dev
 
 RUN apk add bats sqlite yaml yaml-dev \
     && git clone git://github.com/syohex/emacs-libyaml.git \