From 2bf2c1a67c87683bcb6beb4b0a5f02900967b2e4 Mon Sep 17 00:00:00 2001
From: Stephen Karger <stephen.karger@gmail.com>
Date: Fri, 29 May 2020 17:17:43 -0400
Subject: [PATCH] Treat Middleware::Base#initialize options as Hash. (#2064)

---
 CHANGELOG.md                 | 1 +
 lib/grape/middleware/base.rb | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 135c7443ef..eec65e0748 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@
 #### Fixes
 
 * Your contribution here.
+* [#2064](https://github.com/ruby-grape/grape/pull/2064): Fix Ruby 2.7 deprecation warning in `Grape::Middleware::Base#initialize` - [@skarger](https://github.com/skarger).
 
 ### 1.3.3 (2020/05/23)
 
diff --git a/lib/grape/middleware/base.rb b/lib/grape/middleware/base.rb
index 19be12d4cc..2b5657e734 100644
--- a/lib/grape/middleware/base.rb
+++ b/lib/grape/middleware/base.rb
@@ -14,9 +14,9 @@ class Base
 
       # @param [Rack Application] app The standard argument for a Rack middleware.
       # @param [Hash] options A hash of options, simply stored for use by subclasses.
-      def initialize(app, **options)
+      def initialize(app, options = {})
         @app = app
-        @options = default_options.merge(**options)
+        @options = default_options.merge(options)
         @app_response = nil
       end