diff --git a/lib/evil/client/resolver/request.rb b/lib/evil/client/resolver/request.rb
index 0c1dc12..b8b24c3 100644
--- a/lib/evil/client/resolver/request.rb
+++ b/lib/evil/client/resolver/request.rb
@@ -35,7 +35,7 @@ def environment
         "SERVER_NAME" => uri.host,
         "SERVER_PORT" => uri.port,
         "HTTP_Variables" => headers,
-        "rack.version" => Rack::VERSION,
+        "rack.version" => Rack.release,
         "rack.url_scheme" => uri.scheme,
         "rack.input" => Formatter.call(body, format, boundary: boundary),
         "rack.multithread" => false,
diff --git a/spec/unit/connection_spec.rb b/spec/unit/connection_spec.rb
index 4682167..64e6ca0 100644
--- a/spec/unit/connection_spec.rb
+++ b/spec/unit/connection_spec.rb
@@ -15,7 +15,7 @@
         "Authorization" => "Bearer eoiqopr==",
         "Content-Type" => "application/json"
       },
-      "rack.version" => Rack::VERSION,
+      "rack.version" => Rack.release,
       "rack.input" => "name=Andrew&age=46",
       "rack.url_scheme" => "https",
       "rack.multithread" => false,
diff --git a/spec/unit/resolver/request_spec.rb b/spec/unit/resolver/request_spec.rb
index 7e8c2f3..0b7a329 100644
--- a/spec/unit/resolver/request_spec.rb
+++ b/spec/unit/resolver/request_spec.rb
@@ -50,7 +50,7 @@
         "Authorization" => "Bearer eoiqopr==",
         "Content-Type" => "application/json"
       },
-      "rack.version" => Rack::VERSION,
+      "rack.version" => Rack.release,
       "rack.input" => '{"version":"v77"}',
       "rack.url_scheme" => "https",
       "rack.multithread" => false,