diff --git a/dabest/_classes.py b/dabest/_classes.py
index 0c177e9c..880ccf96 100644
--- a/dabest/_classes.py
+++ b/dabest/_classes.py
@@ -898,7 +898,7 @@ def to_dict(self):
             out[a] = getattr(self, a)
         return out
     
-    def configure_results(self, __results: pd.DataFrame, column_names: list[str]):
+    def configure_results(self, __results: pd.DataFrame, column_names):
         self.__results = __results
         self.__results.columns = column_names
 
@@ -1312,7 +1312,7 @@ def to_dict(self):
             out[a] = getattr(self, a)
         return out
     
-    def configure_results(self, __results: pd.DataFrame, column_names: list[str]):
+    def configure_results(self, __results: pd.DataFrame, column_names):
         self.__results = __results
         self.__results.columns = column_names
 
diff --git a/nbs/API/class.ipynb b/nbs/API/class.ipynb
index ac9e363d..1c1f1579 100644
--- a/nbs/API/class.ipynb
+++ b/nbs/API/class.ipynb
@@ -1550,7 +1550,7 @@
     "            out[a] = getattr(self, a)\n",
     "        return out\n",
     "    \n",
-    "    def configure_results(self, __results: pd.DataFrame, column_names: list[str]):\n",
+    "    def configure_results(self, __results: pd.DataFrame, column_names):\n",
     "        self.__results = __results\n",
     "        self.__results.columns = column_names\n",
     "\n",
@@ -2057,7 +2057,7 @@
     "            out[a] = getattr(self, a)\n",
     "        return out\n",
     "    \n",
-    "    def configure_results(self, __results: pd.DataFrame, column_names: list[str]):\n",
+    "    def configure_results(self, __results: pd.DataFrame, column_names):\n",
     "        self.__results = __results\n",
     "        self.__results.columns = column_names\n",
     "\n",