diff --git a/handlers/BasicPrmonMetrics.py b/handlers/BasicPrmonMetrics.py
index 26502b82a1f688db420ca6d4c981bbcce8260e59..c21d0b20b1bff21a7f0bce4270d5c8661c6201b8 100644
--- a/handlers/BasicPrmonMetrics.py
+++ b/handlers/BasicPrmonMetrics.py
@@ -54,7 +54,7 @@ class BasicPrmonMetrics(BaseHandler):
                     for i, h in enumerate(headers):
                         data[h].append(vals[i])
 
-            return json.dumps(data)
+            return data
 
         except FileNotFoundError:
             log.error(f"failed to locate {file_path}")