diff --git a/freight_kit.gemspec b/freight_kit.gemspec
index 40f67a2..747d9ad 100644
--- a/freight_kit.gemspec
+++ b/freight_kit.gemspec
@@ -37,7 +37,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency('redcarpet', '~> 3.6.0') # for yard
   spec.add_development_dependency('yard', '~> 0.9.28')
 
-  spec.add_dependency('activemodel', '>= 4.2', '< 7.1.3')
+  spec.add_dependency('activemodel', '>= 4.2', '< 7.1.4')
   spec.add_dependency('activesupport', '>= 4.2', '< 7.1.4')
   spec.add_dependency('active_utils', '>= 3.3.1', '< 3.5.0')
   spec.add_dependency('httparty', '~> 0.10')