diff --git a/docs/conf.py b/docs/conf.py
index 54598bf..f486b24 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -176,8 +176,7 @@
         'SortedContainers Documentation',
         author,
         'SortedContainers',
-        'Python sorted collections library:'
-        ' sorted list, sorted dict, and sorted set.',
+        'Python sorted collections library: sorted list, sorted dict, and sorted set.',
         'Miscellaneous',
     ),
 ]
diff --git a/pyproject.toml b/pyproject.toml
index e135023..5fbc6a4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,6 +35,7 @@ version = {attr = "sortedcontainers.__version__"}
 where = ["src"]
 
 [tool.ruff]
+target-version = "py38"
 format.quote-style = "single"
 
 [tool.ruff.lint]
diff --git a/src/sortedcontainers/sorteddict.py b/src/sortedcontainers/sorteddict.py
index 273c9ce..0be576e 100644
--- a/src/sortedcontainers/sorteddict.py
+++ b/src/sortedcontainers/sorteddict.py
@@ -191,7 +191,7 @@ def iloc(self):
             return self._iloc
         except AttributeError:
             warnings.warn(
-                'sorted_dict.iloc is deprecated.' ' Use SortedDict.keys() instead.',
+                'sorted_dict.iloc is deprecated. Use SortedDict.keys() instead.',
                 DeprecationWarning,
                 stacklevel=2,
             )