Obtained from:	https://github.com/tpitale/mail_room/commit/48f8e0822ef407d517671a93a05222bee17af04c

--- mail_room.gemspec.orig	2023-11-02 06:19:40 UTC
+++ mail_room.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |s|
   s.specification_version = 4
 
   s.add_runtime_dependency(%q<net-imap>.freeze, [">= 0.2.1"])
-  s.add_runtime_dependency(%q<oauth2>.freeze, ["~> 1.4.4"])
+  s.add_runtime_dependency(%q<oauth2>.freeze, [">= 1.4.4", "< 3"])
   s.add_development_dependency(%q<rake>.freeze, [">= 0"])
   s.add_development_dependency(%q<rspec>.freeze, ["~> 3.9"])
   s.add_development_dependency(%q<rubocop>.freeze, ["~> 1.11"])
