diff --git a/src/layoutparser/io/basic.py b/src/layoutparser/io/basic.py
index 0b2df36..26dcccc 100644
--- a/src/layoutparser/io/basic.py
+++ b/src/layoutparser/io/basic.py
@@ -127,7 +127,7 @@ def load_dataframe(df: pd.DataFrame, block_type: str = None) -> Layout:
     """
     df = df.copy()
     if "points" in df.columns:
-        if df["points"].dtype == object:
+        if df["points"].dtype == object or isinstance(df["points"].dtype, pd.StringDtype):
             df["points"] = df["points"].map(
                 lambda x: ast.literal_eval(x) if not pd.isna(x) else x
             )