diff --git a/dropbox_api.gemspec b/dropbox_api.gemspec
index 09bf4abc..7965a3b2 100644
--- a/dropbox_api.gemspec
+++ b/dropbox_api.gemspec
@@ -21,5 +21,5 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = '>= 2.3'
 
   spec.add_dependency 'faraday', '< 3.0'
-  spec.add_dependency 'oauth2', '~> 1.1'
+  spec.add_dependency 'oauth2', '>= 1.1', "< 3"
 end