diff --git a/arkindex_worker/worker/base.py b/arkindex_worker/worker/base.py
index 23ac2c1d22d69f5da4142d0f1586f33c5cd91abe..914389de0f2bbd8f68fd5217ce0ebca0a574bb57 100644
--- a/arkindex_worker/worker/base.py
+++ b/arkindex_worker/worker/base.py
@@ -266,7 +266,7 @@ class BaseWorker:
         model_version = worker_run.get("model_version")
         if model_version:
             logger.info("Loaded model version configuration from WorkerRun")
-            self.model_configuration.update(model_version.get("configuration"))
+            self.model_configuration.update(model_version.get("configuration", {}))
 
             # Set model_version ID as worker attribute
             self.model_version_id = model_version.get("id")