1 files changed, 10 insertions, 0 deletions
diff --git a/lib/ci/api/api.rb b/lib/ci/api/api.rb
index a6b9beecded..24bb3649a76 100644
--- a/lib/ci/api/api.rb
+++ b/lib/ci/api/api.rb
@@ -8,6 +8,16 @@ module Ci
         rack_response({ 'message' => '404 Not found' }.to_json, 404)
       end
 
+      # Retain 405 error rather than a 500 error for Grape 0.15.0+.
+      # https://github.com/ruby-grape/grape/blob/a3a28f5b5dfbb2797442e006dbffd750b27f2a76/UPGRADING.md#changes-to-method-not-allowed-routes
+      rescue_from Grape::Exceptions::MethodNotAllowed do |e|
+        error! e.message, e.status, e.headers
+      end
+
+      rescue_from Grape::Exceptions::Base do |e|
+        error! e.message, e.status, e.headers
+      end
+
       rescue_from :all do |exception|
         handle_api_exception(exception)
       end