diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7ffa0612..95ac35ea 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -25,7 +25,7 @@ repos:
         exclude: &exclude_pattern 'iv_weak_instruments.ipynb'
         args: ["--maxkb=1500"]
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.5.4
+    rev: v0.5.5
     hooks:
       # Run the linter
       - id: ruff
diff --git a/causalpy/tests/test_synthetic_data.py b/causalpy/tests/test_synthetic_data.py
index 0eb66f2e..51da6a3e 100644
--- a/causalpy/tests/test_synthetic_data.py
+++ b/causalpy/tests/test_synthetic_data.py
@@ -26,7 +26,7 @@ def test_generate_multicell_geolift_data():
     from causalpy.data.simulate_data import generate_multicell_geolift_data
 
     df = generate_multicell_geolift_data()
-    assert type(df) == pd.DataFrame
+    assert isinstance(df, pd.DataFrame)
     assert np.all(df >= 0), "Found negative values in dataset"
 
 
@@ -37,5 +37,5 @@ def test_generate_geolift_data():
     from causalpy.data.simulate_data import generate_geolift_data
 
     df = generate_geolift_data()
-    assert type(df) == pd.DataFrame
+    assert isinstance(df, pd.DataFrame)
     assert np.all(df >= 0), "Found negative values in dataset"