diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 0fe7f27..6f27e8c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -2,13 +2,13 @@ ci:
   autoupdate_schedule: quarterly
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.5.0
+    rev: v4.6.0
     hooks:
     - id: check-yaml
     - id: end-of-file-fixer
     - id: trailing-whitespace
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.4.5
+    rev: v0.5.0
     hooks:
       # Run the linter.
       - id: ruff
diff --git a/swn/file.py b/swn/file.py
index d86524f..cccae92 100644
--- a/swn/file.py
+++ b/swn/file.py
@@ -165,7 +165,7 @@ def gdf_to_shapefile(gdf, shp_fname, **kwargs):
     for col, dtype in gdf.dtypes.items():
         if col == geom_name:
             continue
-        if dtype == bool:
+        if dtype is bool:
             gdf[col] = gdf[col].astype(int)
         elif np.issubdtype(dtype, np.number):
             pass