diff --git a/Gemfile.lock b/Gemfile.lock
index a812dad..8d05a30 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     eship-ruby (0.1.0)
-      httparty (~> 0.16.0)
+      httparty (>= 0.16, < 0.22)
 
 GEM
   remote: https://rubygems.org/
@@ -19,13 +19,11 @@ GEM
     git (1.6.0)
       rchardet (~> 1.8)
     hashdiff (1.0.1)
-    httparty (0.16.4)
-      mime-types (~> 3.0)
+    httparty (0.21.0)
+      mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
     jaro_winkler (1.5.4)
-    mime-types (3.3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2019.1009)
+    mini_mime (1.1.2)
     multi_xml (0.6.0)
     parallel (1.19.1)
     parser (2.7.1.1)
diff --git a/eship-ruby.gemspec b/eship-ruby.gemspec
index 3818035..ae4118b 100644
--- a/eship-ruby.gemspec
+++ b/eship-ruby.gemspec
@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
   
-  spec.add_dependency 'httparty', '~> 0.16.0'
+  spec.add_dependency 'httparty', '>= 0.16', '< 0.22'
 
   spec.add_development_dependency 'app_version_tasks'
   spec.add_development_dependency 'bundler', '~> 1.17'