diff --git a/src/functions.rs b/src/functions.rs
index 6817af7b..b6dea80c 100644
--- a/src/functions.rs
+++ b/src/functions.rs
@@ -16,7 +16,6 @@
 // under the License.
 
 use datafusion::functions_aggregate::all_default_aggregate_functions;
-use datafusion::logical_expr::window_function;
 use datafusion::logical_expr::ExprFunctionExt;
 use datafusion::logical_expr::WindowFrame;
 use pyo3::{prelude::*, wrap_pyfunction};
@@ -33,6 +32,7 @@ use datafusion::common::{Column, ScalarValue, TableReference};
 use datafusion::execution::FunctionRegistry;
 use datafusion::functions;
 use datafusion::functions_aggregate;
+use datafusion::functions_window;
 use datafusion::logical_expr::expr::Alias;
 use datafusion::logical_expr::sqlparser::ast::NullTreatment as DFNullTreatment;
 use datafusion::logical_expr::{
@@ -757,7 +757,7 @@ pub fn lead(
     partition_by: Option<Vec<PyExpr>>,
     order_by: Option<Vec<PySortExpr>>,
 ) -> PyResult<PyExpr> {
-    let window_fn = datafusion::functions_window::expr_fn::lead(arg.expr, Some(shift_offset), default_value);
+    let window_fn = functions_window::expr_fn::lead(arg.expr, Some(shift_offset), default_value);
 
     add_builder_fns_to_window(window_fn, partition_by, None, order_by, None)
 }
@@ -771,7 +771,7 @@ pub fn lag(
     partition_by: Option<Vec<PyExpr>>,
     order_by: Option<Vec<PySortExpr>>,
 ) -> PyResult<PyExpr> {
-    let window_fn = datafusion::functions_window::expr_fn::lag(arg.expr, Some(shift_offset), default_value);
+    let window_fn = functions_window::expr_fn::lag(arg.expr, Some(shift_offset), default_value);
 
     add_builder_fns_to_window(window_fn, partition_by, None, order_by, None)
 }
@@ -782,7 +782,7 @@ pub fn row_number(
     partition_by: Option<Vec<PyExpr>>,
     order_by: Option<Vec<PySortExpr>>,
 ) -> PyResult<PyExpr> {
-    let window_fn = datafusion::functions_window::expr_fn::row_number();
+    let window_fn = functions_window::expr_fn::row_number();
 
     add_builder_fns_to_window(window_fn, partition_by, None, order_by, None)
 }
@@ -793,7 +793,7 @@ pub fn rank(
     partition_by: Option<Vec<PyExpr>>,
     order_by: Option<Vec<PySortExpr>>,
 ) -> PyResult<PyExpr> {
-    let window_fn = datafusion::functions_window::expr_fn::rank();
+    let window_fn = functions_window::expr_fn::rank();
 
     add_builder_fns_to_window(window_fn, partition_by, None, order_by, None)
 }
@@ -804,7 +804,7 @@ pub fn dense_rank(
     partition_by: Option<Vec<PyExpr>>,
     order_by: Option<Vec<PySortExpr>>,
 ) -> PyResult<PyExpr> {
-    let window_fn = datafusion::functions_window::expr_fn::dense_rank();
+    let window_fn = functions_window::expr_fn::dense_rank();
 
     add_builder_fns_to_window(window_fn, partition_by, None, order_by, None)
 }
@@ -815,7 +815,7 @@ pub fn percent_rank(
     partition_by: Option<Vec<PyExpr>>,
     order_by: Option<Vec<PySortExpr>>,
 ) -> PyResult<PyExpr> {
-    let window_fn = datafusion::functions_window::expr_fn::percent_rank();
+    let window_fn = functions_window::expr_fn::percent_rank();
 
     add_builder_fns_to_window(window_fn, partition_by, None, order_by, None)
 }
@@ -826,7 +826,7 @@ pub fn cume_dist(
     partition_by: Option<Vec<PyExpr>>,
     order_by: Option<Vec<PySortExpr>>,
 ) -> PyResult<PyExpr> {
-    let window_fn = datafusion::functions_window::expr_fn::cume_dist();
+    let window_fn = functions_window::expr_fn::cume_dist();
 
     add_builder_fns_to_window(window_fn, partition_by, None, order_by, None)
 }
@@ -838,7 +838,7 @@ pub fn ntile(
     partition_by: Option<Vec<PyExpr>>,
     order_by: Option<Vec<PySortExpr>>,
 ) -> PyResult<PyExpr> {
-    let window_fn = datafusion::functions_window::expr_fn::ntile(arg.into());
+    let window_fn = functions_window::expr_fn::ntile(arg.into());
 
     add_builder_fns_to_window(window_fn, partition_by, None, order_by, None)
 }