diff --git a/fakesnow/transforms.py b/fakesnow/transforms.py
index e312151..cf3bdfa 100644
--- a/fakesnow/transforms.py
+++ b/fakesnow/transforms.py
@@ -236,7 +236,7 @@ def object_construct(expression: exp.Expression) -> exp.Expression:
     Example:
         >>> import sqlglot
         >>> sqlglot.parse_one("SELECT OBJECT_CONSTRUCT('a',1,'b','BBBB', 'c',null)", read="snowflake").transform(object_construct).sql(dialect="duckdb")
-        "SELECT TO_JSON(OBJECT_CONSTRUCT('a',1,'b','BBBB', 'c',null))"
+        "SELECT TO_JSON({'a': 1, 'b': 'BBBB', 'c': NULL})"
     Args:
         expression (exp.Expression): the expression that will be transformed.
 
@@ -244,7 +244,7 @@ def object_construct(expression: exp.Expression) -> exp.Expression:
         exp.Expression: The transformed expression.
     """  # noqa: E501
 
-    if isinstance(expression, exp.VarMap):
+    if isinstance(expression, exp.Struct):
         return exp.Anonymous(this="TO_JSON", expressions=[expression])
 
     return expression
diff --git a/pyproject.toml b/pyproject.toml
index 5539ab0..87a3cd8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ dependencies = [
     "duckdb~=0.8.0",
     # include the pandas extra to get compatible version of pyarrow
     "snowflake-connector-python[pandas]",
-    "sqlglot~=14.1.1",
+    "sqlglot~=15.0.0",
 ]
 
 [project.urls]
diff --git a/tests/test_transforms.py b/tests/test_transforms.py
index 1c5c707..6a99f4a 100644
--- a/tests/test_transforms.py
+++ b/tests/test_transforms.py
@@ -80,7 +80,7 @@ def test_object_construct() -> None:
         sqlglot.parse_one("SELECT OBJECT_CONSTRUCT('a',1,'b','BBBB', 'c',null)", read="snowflake")
         .transform(object_construct)
         .sql(dialect="duckdb")
-        == "SELECT TO_JSON(MAP(LIST_VALUE('a', 'b', 'c'), LIST_VALUE(1, 'BBBB', NULL)))"
+        == "SELECT TO_JSON({'a': 1, 'b': 'BBBB', 'c': NULL})"
     )