diff --git a/pyproject.toml b/pyproject.toml
index 5ecabbc..6522b23 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "tableone"
-version = "0.9.5"
+version = "0.9.6.dev1"
 authors = [
   { name="Tom Pollard", email="tpollard@mit.edu" },
   { name="Alistair Johnson" },
diff --git a/tableone/tables.py b/tableone/tables.py
index 2ec1974..f10fa04 100644
--- a/tableone/tables.py
+++ b/tableone/tables.py
@@ -442,7 +442,7 @@ def create_cont_table(self,
         try:
             table = table.join(nulltable)
         # if columns form a CategoricalIndex, need to convert to string first
-        except TypeError:
+        except (pd.errors.InvalidIndexError, TypeError):
             table.columns = table.columns.astype(str)
             table = table.join(nulltable)
 
@@ -502,7 +502,7 @@ def create_cat_table(self,
         try:
             table = table.join(isnull)
         # if columns form a CategoricalIndex, need to convert to string first
-        except TypeError:
+        except (pd.errors.InvalidIndexError, TypeError):
             table.columns = table.columns.astype(str)
             table = table.join(isnull)