diff --git a/jsonresolver/contrib/jsonref.py b/jsonresolver/contrib/jsonref.py
index e7c9ad1..20074bc 100644
--- a/jsonresolver/contrib/jsonref.py
+++ b/jsonresolver/contrib/jsonref.py
@@ -35,6 +35,7 @@
 from __future__ import absolute_import
 
 from jsonref import JsonLoader as _JsonLoader
+from werkzeug.exceptions import NotFound
 
 
 def json_loader_factory(resolver):
@@ -46,7 +47,7 @@ def get_remote_json(self, uri, **kwargs):
             """Resolve remove uri using given resolver."""
             try:
                 return resolver.resolve(uri)
-            except Exception:
+            except NotFound:
                 return super(JsonLoader, self).get_remote_json(uri, **kwargs)
 
     return JsonLoader
diff --git a/jsonresolver/contrib/jsonschema.py b/jsonresolver/contrib/jsonschema.py
index 5dddbd6..a6c6d85 100644
--- a/jsonresolver/contrib/jsonschema.py
+++ b/jsonresolver/contrib/jsonschema.py
@@ -32,6 +32,7 @@
 from __future__ import absolute_import
 
 from jsonschema import RefResolver as _RefResolver
+from werkzeug.exceptions import NotFound
 
 
 def ref_resolver_factory(resolver):
@@ -46,7 +47,7 @@ def resolve_remote(self, uri):
                 if self.cache_remote:
                     self.store[uri] = result
                 return result
-            except Exception:
+            except NotFound:
                 return super(RefResolver, self).resolve_remote(uri)
 
     return RefResolver