diff --git a/Dockerfile b/Dockerfile
index 38829c8..438f678 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM alpine:3.13
 
 MAINTAINER Hanjo Meinhardt <hanjo@bunix.de>
 
-ENV dev_packages="ca-certificates build-base libffi-dev ruby-dev ruby-rdoc ruby-irb"
+ENV dev_packages="ca-certificates build-base libffi-dev ruby-dev ruby-rdoc ruby-irb gcc make musl-dev"
 
 RUN apk update && apk upgrade \
     && apk add ruby ruby-json ${dev_packages} \
@@ -12,6 +12,7 @@ RUN gem install jekyll -v <VERSION> \
     && gem install jekyll-paginate \
     && gem install jekyll-auto-image \
     && gem install jekyll-tidy \
-    && gem install jekyll-sitemap
+    && gem install jekyll-sitemap \
+    && gem install bigdecimal 
 
 RUN apk del ${dev_packages}