diff --git a/gqlalchemy/query_builders/declarative_base.py b/gqlalchemy/query_builders/declarative_base.py
index e97094a1..11531fac 100644
--- a/gqlalchemy/query_builders/declarative_base.py
+++ b/gqlalchemy/query_builders/declarative_base.py
@@ -92,6 +92,7 @@ class Operator(Enum):
     LEQ_THAN = "<="
     NOT_EQUAL = "!="
     INCREMENT = "+="
+    SIMILAR = "=~"
 
 
 class Order(Enum):
diff --git a/tests/query_builders/test_query_builders.py b/tests/query_builders/test_query_builders.py
index 7e4ae429..c4f9f4c6 100644
--- a/tests/query_builders/test_query_builders.py
+++ b/tests/query_builders/test_query_builders.py
@@ -306,7 +306,7 @@ def test_multiple_merges(self, vendor):
 
         mock.assert_called_with(expected_query)
 
-    @pytest.mark.parametrize("operator", ["=", "<>", "<", "!=", ">", "<=", ">="])
+    @pytest.mark.parametrize("operator", ["=", "<>", "<", "!=", ">", "<=", ">=", "=~"])
     def test_where_without_operator_enum(self, vendor, operator):
         query_builder = (
             vendor[1]
@@ -318,7 +318,6 @@ def test_where_without_operator_enum(self, vendor, operator):
             .return_()
         )
         expected_query = f" MATCH (n:L1)-[:TO]->(m:L2) WHERE n.name {operator} 'best_name' RETURN * "
-
         with patch.object(vendor[0], "execute_and_fetch", return_value=None) as mock:
             query_builder.execute()