diff --git a/.github/workflows/pypi-publish.yml b/.github/workflows/pypi-publish.yml
index 8ff93c6..9cef8ec 100644
--- a/.github/workflows/pypi-publish.yml
+++ b/.github/workflows/pypi-publish.yml
@@ -13,9 +13,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python 3.10
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v5
       with:
         python-version: "3.10"
     - name: Install dependencies
diff --git a/.github/workflows/python-app.yml b/.github/workflows/python-app.yml
index 7598b25..06846b8 100644
--- a/.github/workflows/python-app.yml
+++ b/.github/workflows/python-app.yml
@@ -18,11 +18,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
-    - name: Set up Python 3.10
-      uses: actions/setup-python@v3
+    - uses: actions/checkout@v4
+    - name: Set up Python 3.13
+      uses: actions/setup-python@v5
       with:
-        python-version: "3.10"
+        python-version: "3.13"
     - name: Install dependencies
       run: |
         sudo apt update
@@ -40,7 +40,7 @@ jobs:
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Lint with pylint
       run: |
-        pylint ./src/dear_ros_node_viewer --disable=E0401
+        pylint ./src/dear_ros_node_viewer --disable=E0401,W1203,C0301
     - name: Test with pytest
       run: |
         pytest --doctest-modules -v --cov=./src/dear_ros_node_viewer
diff --git a/src/dear_ros_node_viewer/dot2networkx.py b/src/dear_ros_node_viewer/dot2networkx.py
index 1c90836..ac3823d 100644
--- a/src/dear_ros_node_viewer/dot2networkx.py
+++ b/src/dear_ros_node_viewer/dot2networkx.py
@@ -28,7 +28,7 @@
 def dot2networkx_nodeonly(graph_org: nx.classes.digraph.DiGraph,
               ignore_unconnected=True) -> nx.classes.digraph.DiGraph:
   """Create NetworkX Object from dot graph file (nodes only) by rqt_graph"""
-  graph = nx.DiGraph()
+  graph = nx.MultiDiGraph()
   for node_org in graph_org.nodes:
     if 'label' not in graph_org.nodes[node_org]:
       continue
@@ -82,7 +82,7 @@ def dot2networkx_nodetopic(graph_org: nx.classes.digraph.DiGraph) -> nx.classes.
 
 def dot2networkx(filename: str, ignore_unconnected=True) -> nx.classes.digraph.DiGraph:
   """Function to create NetworkX object from dot graph file (rosgraph.dot)"""
-  graph_org = nx.DiGraph(nx.nx_pydot.read_dot(filename))
+  graph_org = nx.MultiDiGraph(nx.nx_pydot.read_dot(filename))
 
   is_node_only = True
   for node_org in graph_org.nodes:
diff --git a/src/dear_ros_node_viewer/graph_layout.py b/src/dear_ros_node_viewer/graph_layout.py
index 9bd1bd6..3871f3b 100644
--- a/src/dear_ros_node_viewer/graph_layout.py
+++ b/src/dear_ros_node_viewer/graph_layout.py
@@ -94,7 +94,7 @@ def place_node(graph: nx.classes.digraph.DiGraph, group_name: str, prog: str = '
     Dictionary of normalized positions keyed by node.
   """
 
-  graph_modified = nx.DiGraph()
+  graph_modified = nx.MultiDiGraph()
   for node_name in graph.nodes:
     if group_name in node_name:
       graph_modified.add_node(node_name)
diff --git a/src/dear_ros_node_viewer/graph_manager.py b/src/dear_ros_node_viewer/graph_manager.py
index 9c6bba6..97fc910 100644
--- a/src/dear_ros_node_viewer/graph_manager.py
+++ b/src/dear_ros_node_viewer/graph_manager.py
@@ -33,7 +33,7 @@ def __init__(self, app_setting, group_setting):
     self.app_setting = app_setting
     self.group_setting = group_setting
     self.dir = './'
-    self.graph: nx.DiGraph = nx.DiGraph()
+    self.graph: nx.DiGraph = nx.MultiDiGraph()
     self.caret_path_dict: dict = {}
 
   def load_graph_from_caret(self, filename: str, target_path: str = 'all_graph'):
diff --git a/src/dear_ros_node_viewer/graph_view.py b/src/dear_ros_node_viewer/graph_view.py
index 035d672..ac7bd73 100644
--- a/src/dear_ros_node_viewer/graph_view.py
+++ b/src/dear_ros_node_viewer/graph_view.py
@@ -367,7 +367,7 @@ def _make_font_table(self, font_path):
 if __name__ == '__main__':
   def local_main():
     """main function for this file"""
-    graph = nx.DiGraph()
+    graph = nx.MultiDiGraph()
     nx.add_path(graph, ['3', '5', '4', '1', '0', '2'])
     nx.add_path(graph, ['3', '0', '4', '2', '1', '5'])
     layout = nx.spring_layout(graph)
diff --git a/tests/test_graph_layout.py b/tests/test_graph_layout.py
index 1e21a33..03200d0 100644
--- a/tests/test_graph_layout.py
+++ b/tests/test_graph_layout.py
@@ -20,7 +20,7 @@
 
 
 def test_graph_layout():
-    graph = nx.DiGraph()
+    graph = nx.MultiDiGraph()
     nx.add_path(graph, ['"/3"', '"/5"', '"/4"', '"/1"', '"/0"', '"/2"'])
 
     group_setting = {