diff --git a/objutils/dwarf/sm.py b/objutils/dwarf/sm.py
index df5e471..140096c 100644
--- a/objutils/dwarf/sm.py
+++ b/objutils/dwarf/sm.py
@@ -140,9 +140,7 @@ def stack_op(self, stack):
 
 
 class DynamicValue:
-
-    """Represents a dynamic value (can only evaluated by a debugger) on the DWARF stack.
-    """
+    """Represents a dynamic value (can only evaluated by a debugger) on the DWARF stack."""
 
     def __init__(self, expr: str):
         self.expr = expr
diff --git a/objutils/dwarf/traverser.py b/objutils/dwarf/traverser.py
index 0bd4d2c..acc28a3 100644
--- a/objutils/dwarf/traverser.py
+++ b/objutils/dwarf/traverser.py
@@ -1374,9 +1374,13 @@ def traverse_tree(self, entry: model.DebugInformationEntry, level: int = 0) -> N
                 lower_bound = 0
                 upper_bound = 0
                 if "lower_bound" in entry.attributes_map:
-                    lower_bound = self.dwarf_expression(entry.attributes_map["lower_bound"].form, entry.attributes_map["lower_bound"].raw_value)
+                    lower_bound = self.dwarf_expression(
+                        entry.attributes_map["lower_bound"].form, entry.attributes_map["lower_bound"].raw_value
+                    )
                 if "upper_bound" in entry.attributes_map:
-                    upper_bound = self.dwarf_expression(entry.attributes_map["upper_bound"].form, entry.attributes_map["upper_bound"].raw_value)
+                    upper_bound = self.dwarf_expression(
+                        entry.attributes_map["upper_bound"].form, entry.attributes_map["upper_bound"].raw_value
+                    )
                 print(
                     f"{'    ' * level}{tag} '{name}'{type_info} [lower_bound={lower_bound}: upper_bound={upper_bound}] [off=0x{entry.offset:08x}]"
                 )
diff --git a/poetry.lock b/poetry.lock
index 6f3281d..200402d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1278,15 +1278,15 @@ files = [
 
 [[package]]
 name = "virtualenv"
-version = "21.14.8"
+version = "21.14.13"
 description = "Virtual Python Environment builder"
 optional = true
 python-versions = ">=3.9"
 groups = ["main"]
 markers = "extra == \"dev\""
 files = [
-    {file = "virtualenv-21.14.8-py3-none-any.whl", hash = "sha256:d2a347fdbc1a65e33c2c5e84dc767b4a3538a25749536a752744d4fe1f71c37a"},
-    {file = "virtualenv-21.14.8.tar.gz", hash = "sha256:394e45ed610ceffb5018e1a179e3a8012c02fd87fe792ab4aae67ce5e7e3afbd"},
+    {file = "virtualenv-21.14.13-py3-none-any.whl", hash = "sha256:5fbb04138a4861580b78ba9110d529a26bc48fcc93c8ec36bc0202eeed96a788"},
+    {file = "virtualenv-21.14.13.tar.gz", hash = "sha256:de5307ba4b9a0001d9c8ea02832d38f63ca432880f416c1bface61c4323fd905"},
 ]
 
 [package.dependencies]