diff --git a/graphene_sqlalchemy/converter.py b/graphene_sqlalchemy/converter.py
index 07a861bd..72926f68 100644
--- a/graphene_sqlalchemy/converter.py
+++ b/graphene_sqlalchemy/converter.py
@@ -91,6 +91,11 @@ def convert_sqlalchemy_type(type, column, registry=None):
 @convert_sqlalchemy_type.register(types.Text)
 @convert_sqlalchemy_type.register(types.Unicode)
 @convert_sqlalchemy_type.register(types.UnicodeText)
+@convert_sqlalchemy_type.register(types.Enum)
+@convert_sqlalchemy_type.register(postgresql.ENUM)
+@convert_sqlalchemy_type.register(postgresql.INET)
+@convert_sqlalchemy_type.register(postgresql.CIDR)
+
 @convert_sqlalchemy_type.register(postgresql.UUID)
 @convert_sqlalchemy_type.register(TSVectorType)
 def convert_column_to_string(type, column, registry=None):