diff --git a/marginaleffects/plot_common.py b/marginaleffects/plot_common.py
index 09d1a84..ff5e2a4 100644
--- a/marginaleffects/plot_common.py
+++ b/marginaleffects/plot_common.py
@@ -11,15 +11,12 @@
 def dt_on_condition(model, condition):
     model = sanitize_model(model)
 
+    # not sure why newdata gets added
     modeldata = model.modeldata
 
     if isinstance(condition, str):
         condition = [condition]
 
-    assert (
-        1 <= len(condition) <= 3
-    ), f"Lenght of condition must be inclusively between 1 and 3. Got : {len(condition)}."
-
     to_datagrid = {}
     first_key = ""  # special case when the first element is numeric
 
@@ -37,6 +34,12 @@ def dt_on_condition(model, condition):
         first_key = next(iter(condition))
         to_datagrid = condition
 
+    # not sure why `newdata` sometimes gets added
+    condition.pop("newdata", None)
+    assert (
+        1 <= len(condition) <= 3
+    ), f"Lenght of condition must be inclusively between 1 and 3. Got : {len(condition)}."
+
     for key, value in to_datagrid.items():
         variable_type = get_variable_type(key, modeldata)
 
@@ -209,14 +212,13 @@ def plot_common(dt, y_label, var_list):
                     )
                 else:
                     title = dim_max_j
-                    title += (
-                        "\n"
-                        + subplot_dt.select(pl.first("term")).item()
-                        + ", "
-                        + dim_min_i
-                        if dim_min_i is not None
-                        else ""
-                    )
+                    if dim_min_i is not None:
+                        title += (
+                            "\n"
+                            + subplot_dt.select(pl.first("term")).item()
+                            + ", "
+                            + dim_min_i
+                        )
 
                 fig.axes[axe].set_title(title, fontsize=titles_fontsize)
 
diff --git a/pyproject.toml b/pyproject.toml
index c81238e..c0a938f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ polars = ">0.18.3"
 pyarrow = "^14.0.1"
 scipy = "^1.10.0"
 matplotlib = "^3.7.2"
-pyfixest = ">= 0.11.1"
+pyfixest = ">= 0.11.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.4.0"
diff --git a/tests/test_plot_predictions.py b/tests/test_plot_predictions.py
index 60029fc..6772891 100644
--- a/tests/test_plot_predictions.py
+++ b/tests/test_plot_predictions.py
@@ -63,3 +63,18 @@ def test_issue_57():
     fig = plot_predictions(mod, condition={"am": None, "wt": None})
     assert assert_image(fig, "issue_57_04", "plot_predictions") is None
 
+
+
+def issue_62():
+    import types
+    mtcars = pl.read_csv("https://vincentarelbundock.github.io/Rdatasets/csv/datasets/mtcars.csv")
+    mod = smf.ols("mpg ~ hp * wt * am", data = mtcars).fit()
+    cond = {
+    "hp": None,
+    "wt": [mtcars["wt"].mean() - mtcars["wt"].std(),
+            mtcars["wt"].mean(),
+            mtcars["wt"].mean() + mtcars["wt"].std()],
+    "am": None
+    }
+    p = plot_predictions(mod, condition = cond)
+    assert isinstance(p, types.ModuleType)
\ No newline at end of file