diff --git a/npm_and_yarn/lib/dependabot/npm_and_yarn/update_checker/registry_finder.rb b/npm_and_yarn/lib/dependabot/npm_and_yarn/update_checker/registry_finder.rb
index 3ad848f6719..ba1b984c2fd 100644
--- a/npm_and_yarn/lib/dependabot/npm_and_yarn/update_checker/registry_finder.rb
+++ b/npm_and_yarn/lib/dependabot/npm_and_yarn/update_checker/registry_finder.rb
@@ -86,6 +86,10 @@ def first_registry_with_dependency_details
                 headers: auth_header_for(details["token"])
               )
               response.status < 400 && JSON.parse(response.body)
+              if response.status >= 400
+                raise DependencyFileNotResolvable,
+                      "Response status from the `#{details["registry"]}` registry: #{response.status}"
+              end
             rescue Excon::Error::Timeout,
                    Excon::Error::Socket,
                    JSON::ParserError