diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 578003d..506d6a3 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1 +1 @@
-* @JimmyPettersson85 @xernobyl @itsmeadi
+* @JimmyPettersson85 @itsmeadi
diff --git a/.rubocop.yml b/.rubocop.yml
index 59d2e8a..1fb395e 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -31,6 +31,8 @@ Metrics/PerceivedComplexity:
 
 Naming/AccessorMethodName:
   Enabled: false
+Naming/PredicateMethod:
+  Enabled: false
 
 Style/AccessorGrouping:
   Enabled: false
diff --git a/lib/stream/activities.rb b/lib/stream/activities.rb
index c0b6567..54f01ff 100644
--- a/lib/stream/activities.rb
+++ b/lib/stream/activities.rb
@@ -53,6 +53,9 @@ def get_activities(params = {})
       end
       %i[enrich reactions].each { |k| params.delete(k) }
 
+      # Handle multiple IDs by joining with commas
+      params[:ids] = params[:ids].join(',') if params[:ids]&.is_a?(Array)
+
       signature = Stream::Signer.create_jwt_token('activities', '*', @api_secret, '*')
       make_request(:get, uri, signature, params)
     end
diff --git a/lib/stream/client.rb b/lib/stream/client.rb
index a366355..95cc47f 100644
--- a/lib/stream/client.rb
+++ b/lib/stream/client.rb
@@ -214,7 +214,7 @@ def call(env)
     end
 
     def initialize(app)
-      super app
+      super
       @parser = nil
     end
 
diff --git a/spec/client_spec.rb b/spec/client_spec.rb
index 732900c..f8b1936 100644
--- a/spec/client_spec.rb
+++ b/spec/client_spec.rb
@@ -139,4 +139,64 @@
     http_client = client.get_http_client
     expect(http_client.conn.options[:timeout]).to eq 5
   end
+
+  describe 'get_activities' do
+    before do
+      @client = Stream::Client.new('key', 'secret', 'app_id')
+      @captured_requests = []
+
+      # Mock the HTTP client to capture requests
+      allow_any_instance_of(Stream::StreamHTTPClient).to receive(:make_http_request) do |_instance, method, relative_url, params, data, headers|
+        @captured_requests << {
+          method: method,
+          url: relative_url,
+          params: params,
+          data: data,
+          headers: headers
+        }
+
+        # Return mock response
+        {
+          'results' => [],
+          'duration' => '10ms'
+        }
+      end
+    end
+
+    it 'should encode multiple activity IDs as comma-separated values' do
+      ids = %w[id1 id2 id3]
+
+      @client.get_activities(ids: ids)
+
+      expect(@captured_requests.length).to eq(1)
+      request = @captured_requests.first
+
+      # Verify the IDs are joined with commas, not passed as an array
+      expect(request[:params][:ids]).to eq('id1,id2,id3')
+      expect(request[:params][:ids]).not_to be_a(Array)
+      expect(request[:url]).to eq('/activities/')
+    end
+
+    it 'should handle single ID without comma separation' do
+      @client.get_activities(ids: ['single-id'])
+
+      expect(@captured_requests.length).to eq(1)
+      request = @captured_requests.first
+
+      # Single ID should still be encoded correctly
+      expect(request[:params][:ids]).to eq('single-id')
+      expect(request[:params][:ids]).not_to be_a(Array)
+    end
+
+    it 'should preserve other parameters when encoding IDs' do
+      @client.get_activities(ids: %w[id1 id2], limit: 10, offset: 20)
+
+      expect(@captured_requests.length).to eq(1)
+      request = @captured_requests.first
+
+      expect(request[:params][:ids]).to eq('id1,id2')
+      expect(request[:params][:limit]).to eq(10)
+      expect(request[:params][:offset]).to eq(20)
+    end
+  end
 end
diff --git a/spec/integration_spec.rb b/spec/integration_spec.rb
index 64be05d..1ff1e89 100644
--- a/spec/integration_spec.rb
+++ b/spec/integration_spec.rb
@@ -179,7 +179,7 @@
       expect(results[0]['id']).to eq response['id']
       feed.remove_activity(response['id'])
       results = feed.get(limit: 1)['results']
-      expect(results[0]['id']).not_to eq response['id'] if results.count > 0
+      expect(results[0]['id']).not_to eq response['id'] if results.any?
     end
 
     example 'removing an activity by foreign_id' do
@@ -675,6 +675,56 @@
         response = @client.get_activities(ids: [activity['id']], reactions: { own: true })
         expect(response['results'][0]['own_reactions']['like'][0]).to eq reaction
       end
+      example 'get multiple activities by IDs' do
+        # Create two different activities
+        activity1 = @feed42.add_activity(
+          actor: 'alice',
+          verb: 'tweet',
+          object: 'message1',
+          foreign_id: "tweet-#{Time.now.to_i}-1"
+        )
+
+        activity2 = @feed42.add_activity(
+          actor: 'bob',
+          verb: 'like',
+          object: 'post1',
+          foreign_id: "like-#{Time.now.to_i}-2"
+        )
+
+        # Remove duration from comparison since it varies
+        activity1.delete('duration')
+        activity2.delete('duration')
+
+        # Wait a moment for activities to be indexed
+        sleep(2)
+
+        # Test: Get both activities by their IDs in a single call
+        response = @client.get_activities(
+          ids: [activity1['id'], activity2['id']]
+        )
+
+        expect(response).to include('duration', 'results')
+        expect(response['results'].count).to be 2
+
+        # Verify both activities are returned
+        returned_ids = response['results'].map { |a| a['id'] }
+        expect(returned_ids).to include(activity1['id'])
+        expect(returned_ids).to include(activity2['id'])
+
+        # Verify the returned activities match the original activities
+        response['results'].each do |returned_activity|
+          returned_activity.delete('duration')
+
+          if returned_activity['id'] == activity1['id']
+            expect(returned_activity).to eq(activity1)
+          elsif returned_activity['id'] == activity2['id']
+            expect(returned_activity).to eq(activity2)
+          else
+            raise "Unexpected activity ID: #{returned_activity['id']}"
+          end
+        end
+      end
+
       example 'activity recent reaction enrichment' do
         activity = @feed42.add_activity({ actor: 'jim', verb: 'buy', object: 'wallet' })
         reaction = @client.reactions.add('dislike', activity['id'], 'jim')