diff --git a/rag/app/table.py b/rag/app/table.py
index 29fa25461ab925f636319aca565581b86df4a9d4..c090080de2aab5cf15bc5e983a316b28713037e8 100644
--- a/rag/app/table.py
+++ b/rag/app/table.py
@@ -199,7 +199,7 @@ def chunk(filename, binary=None, from_page=0, to_page=10000000000,
                 re.sub(
                     r"(/.*|（[^（）]+?）|\([^()]+?\))",
                     "",
-                    n),
+                    str(n)),
                 '_')[0] for n in clmns]
         clmn_tys = []
         for j in range(len(clmns)):
@@ -208,7 +208,7 @@ def chunk(filename, binary=None, from_page=0, to_page=10000000000,
             df[clmns[j]] = cln
             if ty == "text":
                 txts.extend([str(c) for c in cln if c])
-        clmns_map = [(py_clmns[i].lower() + fieds_map[clmn_tys[i]], clmns[i].replace("_", " "))
+        clmns_map = [(py_clmns[i].lower() + fieds_map[clmn_tys[i]], str(clmns[i]).replace("_", " "))
                      for i in range(len(clmns))]
 
         eng = lang.lower() == "english"  # is_english(txts)