diff --git a/.github/workflows/bundler_audit.yml b/.github/workflows/bundler_audit.yml
index e2b9b9e..4a49624 100644
--- a/.github/workflows/bundler_audit.yml
+++ b/.github/workflows/bundler_audit.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ["3.0", "3.1", "3.2"]
+        ruby-version: ["3.3", "3.4"]
     steps:
       - uses: actions/checkout@v4
       - name: Set up Ruby
diff --git a/.github/workflows/rspec.yml b/.github/workflows/rspec.yml
index 61c297d..87c56d6 100644
--- a/.github/workflows/rspec.yml
+++ b/.github/workflows/rspec.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ["3.0", "3.1", "3.2"]
+        ruby-version: ["3.3", "3.4"]
     steps:
       - uses: actions/checkout@v4
       - name: Set up Ruby
diff --git a/spec/eventboss/long_poller_spec.rb b/spec/eventboss/long_poller_spec.rb
index 236fbc9..5641b2f 100644
--- a/spec/eventboss/long_poller_spec.rb
+++ b/spec/eventboss/long_poller_spec.rb
@@ -14,7 +14,7 @@
 
   before do
     allow(client).to receive(:receive_message) do
-      OpenStruct.new(messages: [message])
+      double(messages: [message])
     end
   end