diff --git a/docker/compute_worker/compute_worker.py b/docker/compute_worker/compute_worker.py
index 67a9b1b17..04e3f74bd 100644
--- a/docker/compute_worker/compute_worker.py
+++ b/docker/compute_worker/compute_worker.py
@@ -734,7 +734,7 @@ def push_scores(self):
         elif os.path.exists(os.path.join(self.output_dir, "scores.txt")):
             scores_file = os.path.join(self.output_dir, "scores.txt")
             with open(scores_file) as f:
-                scores = yaml.load(f)
+                scores = yaml.load(f, yaml.Loader)
         else:
             raise SubmissionException("Could not find scores file, did the scoring program output it?")
 
diff --git a/src/apps/api/serializers/leaderboards.py b/src/apps/api/serializers/leaderboards.py
index 5287e5fdf..444425861 100644
--- a/src/apps/api/serializers/leaderboards.py
+++ b/src/apps/api/serializers/leaderboards.py
@@ -128,7 +128,7 @@ def get_columns(self, instance):
         if len(columns) == 0:
             raise serializers.ValidationError("No columns exist on the leaderboard")
         else:
-            return ColumnSerializer(columns, many=len(columns) > 1).data
+            return ColumnSerializer(columns, many=len(columns) >= 1).data
 
     class Meta:
         model = Phase