diff --git a/datacompy/polars.py b/datacompy/polars.py
index 3dbf82ff..1c0f8d56 100644
--- a/datacompy/polars.py
+++ b/datacompy/polars.py
@@ -274,7 +274,7 @@ def _dataframe_merge(self, ignore_spaces: bool) -> None:
         df1 = df1.with_columns(_merge_left=pl.lit(True))
         df2 = df2.with_columns(_merge_right=pl.lit(True))
 
-        outer_join = df1.join(df2, how="outer_coalesce", join_nulls=True, **params)
+        outer_join = df1.join(df2, how="full", coalesce=True, join_nulls=True, **params)
 
         # process merge indicator
         outer_join = outer_join.with_columns(
diff --git a/pyproject.toml b/pyproject.toml
index 806c7ac2..19075892 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ maintainers = [
   { name="Faisal Dosani", email="faisal.dosani@capitalone.com" }
 ]
 license = {text = "Apache Software License"}
-dependencies = ["pandas<=2.2.2,>=0.25.0", "numpy<=1.26.4,>=1.22.0", "ordered-set<=4.1.0,>=4.0.2", "fugue<=0.9.1,>=0.8.7", "polars<=0.20.31,>=0.20.4"]
+dependencies = ["pandas<=2.2.2,>=0.25.0", "numpy<=1.26.4,>=1.22.0", "ordered-set<=4.1.0,>=4.0.2", "fugue<=0.9.1,>=0.8.7", "polars<=1.1.0,>=0.20.4"]
 requires-python = ">=3.9.0"
 classifiers = [
     "Intended Audience :: Developers",
diff --git a/tests/test_polars.py b/tests/test_polars.py
index c878cbba..0640cd29 100644
--- a/tests/test_polars.py
+++ b/tests/test_polars.py
@@ -389,18 +389,14 @@ def test_compare_df_setter_bad():
         PolarsCompare(df, df.clone(), ["b"])
     with raises(DuplicateError, match="duplicate column names found"):
         PolarsCompare(df_same_col_names, df_same_col_names.clone(), ["a"])
-    assert (
-        PolarsCompare(df_dupe, df_dupe.clone(), ["a", "b"])
-        .df1.drop("_merge_left")
-        .equals(df_dupe)
-    )
+    assert PolarsCompare(df_dupe, df_dupe.clone(), ["a", "b"]).df1.equals(df_dupe)
 
 
 def test_compare_df_setter_good():
     df1 = pl.DataFrame([{"a": 1, "b": 2}, {"a": 2, "b": 2}])
     df2 = pl.DataFrame([{"A": 1, "B": 2}, {"A": 2, "B": 3}])
     compare = PolarsCompare(df1, df2, ["a"])
-    assert compare.df1.drop("_merge_left").equals(df1)
+    assert compare.df1.equals(df1)
     assert compare.df2.equals(df2)
     assert compare.join_columns == ["a"]
     compare = PolarsCompare(df1, df2, ["A", "b"])
@@ -1177,10 +1173,12 @@ def test_all_mismatch_ignore_matching_cols_no_cols_matching():
         "strings": ["1", "1", "1", "1.1", "1"],
         "mixed_strings": ["1", "1", "1", "2", "some string"],
         "infinity": [1, 1, 1, 1, np.inf],
-    }
+    },
+    strict=False,
 )
 
 
+@pytest.mark.skipif(pl.__version__ < "1.0.0", reason="polars breaking changes")
 @pytest.mark.parametrize(
     "column,expected",
     [
@@ -1204,10 +1202,12 @@ def test_dupes_with_nulls():
         {
             "fld_1": [1, 2, 2, 3, 3, 4, 5, 5],
             "fld_2": ["A", np.nan, np.nan, np.nan, np.nan, np.nan, np.nan, np.nan],
-        }
+        },
+        strict=False,
     )
     df2 = pl.DataFrame(
-        {"fld_1": [1, 2, 3, 4, 5], "fld_2": ["A", np.nan, np.nan, np.nan, np.nan]}
+        {"fld_1": [1, 2, 3, 4, 5], "fld_2": ["A", np.nan, np.nan, np.nan, np.nan]},
+        strict=False,
     )
     comp = PolarsCompare(df1, df2, join_columns=["fld_1", "fld_2"])
     assert comp.subset()
@@ -1216,25 +1216,36 @@ def test_dupes_with_nulls():
 @pytest.mark.parametrize(
     "dataframe,expected",
     [
-        (pl.DataFrame({"a": [1, 2, 3], "b": [1, 2, 3]}), pl.Series([1, 1, 1])),
         (
-            pl.DataFrame({"a": ["a", "a", "DATACOMPY_NULL"], "b": [1, 1, 2]}),
-            pl.Series([1, 2, 1]),
+            pl.DataFrame({"a": [1, 2, 3], "b": [1, 2, 3]}),
+            pl.Series([1, 1, 1], strict=False),
+        ),
+        (
+            pl.DataFrame(
+                {"a": ["a", "a", "DATACOMPY_NULL"], "b": [1, 1, 2]}, strict=False
+            ),
+            pl.Series([1, 2, 1], strict=False),
         ),
-        (pl.DataFrame({"a": [-999, 2, 3], "b": [1, 2, 3]}), pl.Series([1, 1, 1])),
         (
-            pl.DataFrame({"a": [1, np.nan, np.nan], "b": [1, 2, 2]}),
-            pl.Series([1, 1, 2]),
+            pl.DataFrame({"a": [-999, 2, 3], "b": [1, 2, 3]}, strict=False),
+            pl.Series([1, 1, 1], strict=False),
         ),
         (
-            pl.DataFrame({"a": ["1", np.nan, np.nan], "b": ["1", "2", "2"]}),
-            pl.Series([1, 1, 2]),
+            pl.DataFrame({"a": [1, np.nan, np.nan], "b": [1, 2, 2]}, strict=False),
+            pl.Series([1, 1, 2], strict=False),
         ),
         (
             pl.DataFrame(
-                {"a": [datetime(2018, 1, 1), None, None], "b": ["1", "2", "2"]}
+                {"a": ["1", np.nan, np.nan], "b": ["1", "2", "2"]}, strict=False
             ),
-            pl.Series([1, 1, 2]),
+            pl.Series([1, 1, 2], strict=False),
+        ),
+        (
+            pl.DataFrame(
+                {"a": [datetime(2018, 1, 1), None, None], "b": ["1", "2", "2"]},
+                strict=False,
+            ),
+            pl.Series([1, 1, 2], strict=False),
         ),
     ],
 )
@@ -1242,11 +1253,14 @@ def test_generate_id_within_group(dataframe, expected):
     assert (generate_id_within_group(dataframe, ["a", "b"]) == expected).all()
 
 
+@pytest.mark.skipif(pl.__version__ < "1.0.0", reason="polars breaking changes")
 @pytest.mark.parametrize(
     "dataframe, message",
     [
         (
-            pl.DataFrame({"a": [1, np.nan, "DATACOMPY_NULL"], "b": [1, 2, 3]}),
+            pl.DataFrame(
+                {"a": [1, None, "DATACOMPY_NULL"], "b": [1, 2, 3]}, strict=False
+            ),
             "DATACOMPY_NULL was found in your join columns",
         )
     ],