diff --git a/passworks.gemspec b/passworks.gemspec
index ea578cb..b9ac01c 100644
--- a/passworks.gemspec
+++ b/passworks.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency 'faraday', '~> 0.9.0'
-  spec.add_dependency 'faraday_middleware', '>= 0.9.1', '< 0.14.0'
+  spec.add_dependency 'faraday_middleware', '>= 0.9.1', '< 0.15.0'
 
   spec.add_development_dependency "bundler", "~> 2.0"
   spec.add_development_dependency "rake"