diff --git a/gns3server/controller/__init__.py b/gns3server/controller/__init__.py
index 101854c9..4a66fe2d 100644
--- a/gns3server/controller/__init__.py
+++ b/gns3server/controller/__init__.py
@@ -295,7 +295,7 @@ 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}"')
diff --git a/requirements.txt b/requirements.txt
index 84247047..9f6beade 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ async-timeout>=4.0.2,<4.1
 distro>=1.8.0
 py-cpuinfo>=9.0.0,<10.0
 platformdirs>=2.4.0
-importlib-resources>=1.3; python_version <= '3.9'
+importlib-resources>=1.3; python_version < '3.9'
 truststore>=0.8.0; python_version >= '3.10'
 setuptools>=60.8.1; python_version >= '3.7'
 setuptools==59.6.0; python_version < '3.7'  # v59.6.0 is the last version to support Python 3.6