diff --git a/falcon_apispec/falcon_plugin.py b/falcon_apispec/falcon_plugin.py
index 9583a93..361714b 100644
--- a/falcon_apispec/falcon_plugin.py
+++ b/falcon_apispec/falcon_plugin.py
@@ -2,7 +2,8 @@
 import re
 from apispec import BasePlugin, yaml_utils
 from apispec.exceptions import APISpecError
-
+from apispec.core import VALID_METHODS
+from falcon.routing import map_http_methods
 
 class FalconPlugin(BasePlugin):
     """APISpec plugin for Falcon"""
@@ -11,37 +12,44 @@ def __init__(self, app):
         super(FalconPlugin, self).__init__()
         self._app = app
 
-    @staticmethod
-    def _generate_resource_uri_mapping(app):
-        routes_to_check = copy.copy(app._router._roots)
+    def init_spec(self, spec):
+        self._spec = spec
+
+    def _get_valid_methods(self):
+        return set(VALID_METHODS[self._spec.openapi_version.major])
 
-        mapping = {}
-        for route in routes_to_check:
-            uri = route.uri_template
-            resource = route.resource
-            mapping[resource] = {
-                "uri": uri,
-                "methods": {}
-            }
+    def _generate_resource_uri(self, resource):
+        valid_methods = self._get_valid_methods()
+        routes_to_check = copy.copy(self._app._router._roots)
 
-            if route.method_map:
-                for method_name, method_handler in route.method_map.items():
-                    if method_handler.__dict__.get("__module__") == "falcon.responders":
-                        continue
-                    mapping[resource]["methods"][method_name.lower()] = method_handler
+        route = next(filter(lambda r: r.resource == resource, routes_to_check), None)
+        resource_methods = map_http_methods(resource)
 
-            routes_to_check.extend(route.children)
-        return mapping
+        uri = route.uri_template
+        methods = {}
+        if resource_methods:
+            for method_name, method_handler in resource_methods.items():
+                if method_handler.__module__ == "falcon.responders":
+                    continue
+                if method_name.lower() not in valid_methods:
+                    continue
+                if method_name.lower() not in valid_methods:
+                    continue
+                methods[method_name.lower()] = method_handler
+        
+        return {
+            "uri": uri,
+            "methods": methods
+        }
 
     def path_helper(self, operations, resource, base_path=None, **kwargs):
         """Path helper that allows passing a Falcon resource instance."""
-        resource_uri_mapping = self._generate_resource_uri_mapping(self._app)
-
-        if resource not in resource_uri_mapping:
+        resource_uri = self._generate_resource_uri(resource)
+        if not resource_uri:
             raise APISpecError("Could not find endpoint for resource {0}".format(resource))
 
         operations.update(yaml_utils.load_operations_from_docstring(resource.__doc__) or {})
-        path = resource_uri_mapping[resource]["uri"]
+        path = resource_uri["uri"]
 
         if base_path is not None:
             # make sure base_path accept either with or without leading slash
@@ -49,7 +57,7 @@ def path_helper(self, operations, resource, base_path=None, **kwargs):
             base_path = '/' + base_path.strip('/')
             path = re.sub(base_path, "", path, 1)
 
-        methods = resource_uri_mapping[resource]["methods"]
+        methods = resource_uri["methods"]
 
         for method_name, method_handler in methods.items():
             docstring_yaml = yaml_utils.load_yaml_from_docstring(method_handler.__doc__)
diff --git a/falcon_apispec/version.py b/falcon_apispec/version.py
index 6a9beea..3d26edf 100644
--- a/falcon_apispec/version.py
+++ b/falcon_apispec/version.py
@@ -1 +1 @@
-__version__ = "0.4.0"
+__version__ = "0.4.1"