diff --git a/.ruby-version b/.ruby-version
index 49cdd66..15a2799 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.7.6
+3.3.0
diff --git a/Dockerfile b/Dockerfile
index c6b345b..a9b3382 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.7.6-alpine
+FROM ruby:3.3.0-alpine
 
 # Fetch/install gems
 RUN mkdir -p /opt/gems
diff --git a/Gemfile.lock b/Gemfile.lock
index 39fbebf..1ee406c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,59 +1,69 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    ast (2.4.0)
+    ast (2.4.2)
     commonmarker (0.17.9)
       ruby-enum (~> 0.5)
     concurrent-ruby (1.0.5)
-    diff-lcs (1.5.0)
-    docile (1.4.0)
+    diff-lcs (1.5.1)
+    docile (1.4.1)
     haml (5.0.4)
       temple (>= 0.8.0)
       tilt
     i18n (1.0.1)
       concurrent-ruby (~> 1.0)
-    json (2.6.3)
-    parallel (1.12.1)
-    parser (2.5.1.0)
-      ast (~> 2.4.0)
-    powerpack (0.1.1)
-    rainbow (3.0.0)
-    rake (13.0.6)
-    rexml (3.2.5)
-    rspec (3.12.0)
-      rspec-core (~> 3.12.0)
-      rspec-expectations (~> 3.12.0)
-      rspec-mocks (~> 3.12.0)
-    rspec-core (3.12.0)
-      rspec-support (~> 3.12.0)
-    rspec-expectations (3.12.0)
+    json (2.7.2)
+    language_server-protocol (3.17.0.3)
+    parallel (1.26.3)
+    parser (3.3.4.2)
+      ast (~> 2.4.1)
+      racc
+    racc (1.8.1)
+    rainbow (3.1.1)
+    rake (13.2.1)
+    regexp_parser (2.9.2)
+    rexml (3.3.6)
+      strscan
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.1)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-mocks (3.12.1)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.1)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-support (3.12.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.1)
     rspec_junit_formatter (0.6.0)
       rspec-core (>= 2, < 4, != 2.12.0)
-    rubocop (0.55.0)
+    rubocop (1.66.0)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 2.5)
-      powerpack (~> 0.1)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.4, < 3.0)
+      rubocop-ast (>= 1.32.1, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.0, >= 1.0.1)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.32.2)
+      parser (>= 3.3.1.0)
     ruby-enum (0.7.2)
       i18n
-    ruby-progressbar (1.9.0)
-    simplecov (0.21.2)
+    ruby-progressbar (1.13.0)
+    simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     temple (0.8.0)
     tilt (2.0.8)
-    unicode-display_width (1.3.2)
+    unicode-display_width (2.5.0)
 
 PLATFORMS
   ruby
diff --git a/README.md b/README.md
index e993b45..6fece88 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ Add a build step using the test-summary plugin:
 ```yaml
   - label: annotate
     plugins:
-      - instacart/test-summary#v1.17.0:
+      - instacart/test-summary#v1.18.0:
           inputs:
             - label: RSpec
               artifact_path: artifacts/rspec*
diff --git a/bin/setup b/bin/setup
index 98468d1..7b0b439 100755
--- a/bin/setup
+++ b/bin/setup
@@ -1,4 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+BUNDLE_WITHOUT="development,test"
+BUNDLE_FROZEN="true"
 bundle install --quiet
diff --git a/lib/helpers.bash b/lib/helpers.bash
index 0586021..674287e 100644
--- a/lib/helpers.bash
+++ b/lib/helpers.bash
@@ -11,6 +11,7 @@ function on_failure() {
 function run_plugin() {
     if [[ "${BUILDKITE_PLUGIN_TEST_SUMMARY_RUN_WITHOUT_DOCKER:-false}" = "true" ]]; then
         PLUGIN_BASEDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && cd .. && pwd )"
+        [[ -n `which rbenv` ]] && rbenv shell $(cat $PLUGIN_BASEDIR/.ruby-version)
         BUNDLE_GEMFILE="$PLUGIN_BASEDIR/Gemfile" "$PLUGIN_BASEDIR/bin/setup"
         BUNDLE_GEMFILE="$PLUGIN_BASEDIR/Gemfile" bundler exec "$PLUGIN_BASEDIR/bin/run"
     else
@@ -35,4 +36,4 @@ function run_plugin() {
         -e HTTP_PROXY -e HTTPS_PROXY \
         "$IMAGE"
     fi
-}
\ No newline at end of file
+}
diff --git a/lib/test_summary_buildkite_plugin/input.rb b/lib/test_summary_buildkite_plugin/input.rb
index 2cccfd9..ac6449e 100644
--- a/lib/test_summary_buildkite_plugin/input.rb
+++ b/lib/test_summary_buildkite_plugin/input.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 require 'tmpdir'
 require 'json'
+require 'ostruct'
 
 # We don't use nokogiri because we use an alpine-based docker image
 # And adding the required dependencies triples the size of the image