diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index aa78d289..563a9a02 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -17,7 +17,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v3
diff --git a/gns3server/controller/__init__.py b/gns3server/controller/__init__.py
index 4ecc9f08..ab3bb0b0 100644
--- a/gns3server/controller/__init__.py
+++ b/gns3server/controller/__init__.py
@@ -315,7 +315,7 @@ class Controller:
                 if not os.path.exists(os.path.join(dst_path, filename)):
                     shutil.copy(os.path.join(resource_path, filename), os.path.join(dst_path, filename))
         else:
-            for entry in importlib_resources.files(f'gns3server.{resource_name}').iterdir():
+            for entry in importlib_resources.files('gns3server').joinpath(resource_name).iterdir():
                 full_path = os.path.join(dst_path, entry.name)
                 if entry.is_file() and not os.path.exists(full_path):
                     log.debug(f'Installing {resource_name} resource file "{entry.name}" to "{full_path}"')