diff --git a/oceanbase-sqlalchemy-plugin/oceanbase_sqlalchemy/cx_oracle.py b/oceanbase-sqlalchemy-plugin/oceanbase_sqlalchemy/cx_oracle.py
index 3be9e408..69846ed8 100644
--- a/oceanbase-sqlalchemy-plugin/oceanbase_sqlalchemy/cx_oracle.py
+++ b/oceanbase-sqlalchemy-plugin/oceanbase_sqlalchemy/cx_oracle.py
@@ -22,6 +22,12 @@
 if SA_20_PLUS:
     from sqlalchemy.dialects.oracle import dictionary
 
+    _dictionary_has_ind_expressions = (
+        getattr(dictionary, "all_ind_expressions", None) is not None
+    )
+else:
+    _dictionary_has_ind_expressions = False
+
 
 class OceanBaseCompiler_cx_oracle(OracleCompiler_cx_oracle):
     """
@@ -239,6 +245,8 @@ def _index_query(self, owner):
 
         Only for sqlalchemy 2.x compatibility.
         """
+        if not _dictionary_has_ind_expressions:
+            return super()._index_query(owner)
         return (
             select(
                 dictionary.all_ind_columns.c.table_name,
diff --git a/oceanbase-sqlalchemy-plugin/setup.py b/oceanbase-sqlalchemy-plugin/setup.py
index e92d8bc4..6750071d 100644
--- a/oceanbase-sqlalchemy-plugin/setup.py
+++ b/oceanbase-sqlalchemy-plugin/setup.py
@@ -18,7 +18,6 @@
     keywords="sqlalchemy oceanbase oracle dialect database",
     install_requires=[
         "sqlalchemy>=1.3.0",
-        "cx_oracle>=8.0.0",
     ],
     entry_points={
         "sqlalchemy.dialects": [