diff --git a/prompterator/main.py b/prompterator/main.py
index af4e9fb..4590c84 100644
--- a/prompterator/main.py
+++ b/prompterator/main.py
@@ -500,7 +500,7 @@ def set_up_prompt_attrs_area(st_container):
         # create text of used prompt's variables and their values
         vars_values = ""
         for var in vars:
-            vars_values += var + ":\n    " + st.session_state.row.get(var, "none") + "\n"
+            vars_values += var + ":\n    " + str(st.session_state.row.get(var, "none")) + "\n"
 
         st_container.text_area(
             label=f"Attributes used in a prompt",