diff --git a/.ruby-version b/.ruby-version
index 338a5b5..b502146 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.6.6
+3.0.2
diff --git a/Dockerfile b/Dockerfile
index 7ad17eb..54dc157 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.6.7-buster
+FROM ruby:3.0.2-buster
 
 # docker-ce-cli apt dependencies
 ENV DEBIAN_FRONTEND noninteractive
diff --git a/Gemfile b/Gemfile
index 61537bc..4ef3a79 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@
 
 source 'http://rubygems.org'
 
-ruby '~> 2.6.6'
+ruby '~> 3.0.2'
 
 gem 'bunny', '>= 2.14.1'
 gem 'bunny-pub-sub', '0.0.9', git: 'https://github.com/doubtfire-overseer/bunny-pub-sub'
diff --git a/development.Dockerfile b/development.Dockerfile
index 1bac5cc..29759c5 100644
--- a/development.Dockerfile
+++ b/development.Dockerfile
@@ -35,8 +35,8 @@ RUN touch /var/run/docker.sock && \
 USER 1001:999
 WORKDIR /home/overseer
 
-RUN curl -fsSL https://github.com/rbenv/rbenv-installer/raw/master/bin/rbenv-installer | bash \
-    && rbenv install 2.5.3 && rbenv global 2.5.3 \
+RUN curl -fsSL https://github.com/rbenv/rbenv-installer/raw/main/bin/rbenv-installer | bash \
+    && rbenv install 3.0.2 && rbenv global 3.0.2 \
     && gem install bundler -v 2.0.2
 
 WORKDIR /app