diff --git a/tagreader/web_handlers.py b/tagreader/web_handlers.py
index 8f4de60..2e289d6 100644
--- a/tagreader/web_handlers.py
+++ b/tagreader/web_handlers.py
@@ -115,6 +115,8 @@ def list_aspenone_sources(
     except JSONDecodeError as e:
         logger.error(f"Could not decode JSON response: {e}")
 
+    return []
+
 
 def list_piwebapi_sources(
     url: Optional[str] = None,
@@ -143,6 +145,8 @@ def list_piwebapi_sources(
     except JSONDecodeError as e:
         logger.error(f"Could not decode JSON response: {e}")
 
+    return []
+
 
 def get_piwebapi_source_to_webid_dict(
     url: Optional[str] = None,