diff --git a/Dockerfile b/Dockerfile
index 6945cdb..ada7353 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,15 @@
-FROM decentral1se/jekyll:4
+FROM ruby:2.7.1-alpine
+
+EXPOSE 4000
+
+RUN apk --no-cache add \
+  bash \
+  g++ \
+  git \
+  make
+
+RUN gem install bundler -v 2.1.4
+RUN gem install jekyll -v 4.0.0
 
 COPY . ${WORKDIR}