diff --git a/Dockerfile b/Dockerfile
index f17dfb5..2f51e42 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ RUN apt-get update && apt-get install -y \
   curl -sL https://deb.nodesource.com/setup_12.x | bash - && \
   curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
   echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
-  apt-get update && apt-get install -y nodejs yarn sqlite3 cron
+  apt-get update && apt-get install -y nodejs yarn sqlite3 cron g++
 
 ENV RACK_ENV production
 ENV TZ=America/Campo_Grande