diff --git a/run.py b/run.py
index 9ac667a..1ee89fd 100644
--- a/run.py
+++ b/run.py
@@ -57,7 +57,7 @@ def run_text2img():
         resp_info["code"] = 200
         resp_info["data"] = b64_code
         resp_info["dtype"] = BASE64_IMG
-    resp = make_response(resp_info)
+    resp = make_response(json.dumps(resp_info))
     resp.status_code = 200
     return resp
 
@@ -84,7 +84,7 @@ def run_detection():
             resp_info["code"] = 200
             resp_info["data"] = b64_code
             resp_info["dtype"] = BASE64_IMG
-    resp = make_response(resp_info)
+    resp = make_response(json.dumps(resp_info))
     resp.status_code = 200
     return resp
 
@@ -104,7 +104,7 @@ def run_ocr():
             resp_info["code"] = 200
             resp_info["data"] = text
             resp_info["dtype"] = TEXT
-    resp = make_response(resp_info)
+    resp = make_response(json.dumps(resp_info))
     resp.status_code = 200
     return resp
 
@@ -126,7 +126,7 @@ def run_segmentation():
             resp_info["code"] = 200
             resp_info["data"] = b64_code
             resp_info["dtype"] = BASE64_IMG
-    resp = make_response(resp_info)
+    resp = make_response(json.dumps(resp_info))
     resp.status_code = 200
     return resp
 
@@ -148,7 +148,7 @@ def run_backbone():
             resp_info["code"] = 200
             resp_info["data"] = b64_code
             resp_info["dtype"] = BASE64_IMG
-    resp = make_response(resp_info)
+    resp = make_response(json.dumps(resp_info))
     resp.status_code = 200
     return resp
 
@@ -175,7 +175,8 @@ def run_mnist():
             resp_info["code"] = 200
             resp_info["data"] = str(result)
             resp_info["dtype"] = TEXT
-    resp = make_response(resp_info)
+
+    resp = make_response(json.dumps(resp_info))
     resp.status_code = 200
     return resp