diff --git a/app/serializers/prediction_serializer.rb b/app/serializers/prediction_serializer.rb
index 6af6142a..b046048d 100644
--- a/app/serializers/prediction_serializer.rb
+++ b/app/serializers/prediction_serializer.rb
@@ -12,6 +12,7 @@ class PredictionSerializer < ActiveModel::Serializer
              :mean_confidence,
              :outcome,
              :prediction_group_id,
+             :last_judgement_at,
              :updated_at,
              :uuid,
              :version,
@@ -23,4 +24,8 @@ class PredictionSerializer < ActiveModel::Serializer
   def creator_label
     object.creator.to_s
   end
+
+  def last_judgement_at
+    object.judged_at
+  end
 end
diff --git a/spec/requests/api/my_predictions_controller_spec.rb b/spec/requests/api/my_predictions_controller_spec.rb
index 442133ed..50d46710 100644
--- a/spec/requests/api/my_predictions_controller_spec.rb
+++ b/spec/requests/api/my_predictions_controller_spec.rb
@@ -60,12 +60,16 @@
         predictions = json_hash['predictions']
         expect(predictions.length).to eq 2
 
+        before_judgment_timestamp = Time.now
+        another_prediction.judgements.create!(outcome: true)
+
         get url, params: params.merge(page_size: 1, page: 1)
         json_hash = JSON.parse(response.body)
         predictions = json_hash['predictions']
         actor = json_hash['user']
         expect(predictions.length).to eq 1
         expect(predictions.first['description']).to eq another_prediction.description
+        expect(predictions.first['last_judgement_at'] > before_judgment_timestamp).to be true
         expect(actor['email']).to eq user.email
 
         get url, params: params.merge(page_size: 1, page: 2)