diff --git a/global_var.py b/global_var.py
index 5a449b4..66b3118 100644
--- a/global_var.py
+++ b/global_var.py
@@ -9,7 +9,7 @@ _model = None
 _tokenizer = None
 _workdir = None
 def init_global_var(workdir="workdir"):
-    global _prompt_store, _sql_engine, _docs, _datasets
+    global _prompt_store, _sql_engine, _docs, _datasets, _workdir
     _prompt_store = get_prompt_tinydb(workdir)
     _sql_engine = get_sqlite_engine(workdir)
     _docs = scan_docs_directory(workdir)