diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c43d9430be..9d25c00b3c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
     - repo: https://github.com/pre-commit/pre-commit-hooks
-      rev: v4.6.0
+      rev: v5.0.0
       hooks:
           - id: check-toml
           - id: check-yaml
@@ -12,7 +12,7 @@ repos:
             args: ["--maxkb=500"]
 
     - repo: https://github.com/psf/black
-      rev: 24.8.0
+      rev: 24.10.0
       hooks:
           - id: black-jupyter
 
diff --git a/leafmap/deckgl.py b/leafmap/deckgl.py
index 75629b1783..f2177ec65e 100644
--- a/leafmap/deckgl.py
+++ b/leafmap/deckgl.py
@@ -153,7 +153,7 @@ def add_gdf(
                 kwargs["get_fill_color"] = [0, 0, 255, 128]
             layer = SolidPolygonLayer.from_geopandas(gdf, **kwargs)
 
-        self.layers = self.layers + [layer]
+        self.layers = self.layers + (layer,)
 
         if zoom_to_layer:
             try:
@@ -270,7 +270,7 @@ def add_layer(
             PolygonLayer,
             SolidPolygonLayer,
         ]:
-            self.layers = self.layers + [layer]
+            self.layers = self.layers + (layer,)
 
             if zoom_to_layer:
                 from lonboard._viewport import compute_view