diff --git a/Gemfile.lock b/Gemfile.lock
index 7a5d9ee..93d03d7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     xhash_client (0.3.7)
-      httparty (~> 0.16.0)
+      httparty (>= 0.16, < 0.22)
       json (~> 2.0)
 
 GEM
@@ -15,13 +15,11 @@ GEM
     diff-lcs (1.3)
     docile (1.3.2)
     hashdiff (1.0.0)
-    httparty (0.16.4)
-      mime-types (~> 3.0)
+    httparty (0.21.0)
+      mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
     json (2.2.0)
-    mime-types (3.3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2020.0512)
+    mini_mime (1.1.2)
     multi_xml (0.6.0)
     public_suffix (4.0.1)
     rspec (3.8.0)
diff --git a/xhash_client.gemspec b/xhash_client.gemspec
index ec6bde5..557d9a7 100644
--- a/xhash_client.gemspec
+++ b/xhash_client.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.homepage    = 'https://rubygems.org/gems/xhash-ruby'
   spec.license      = 'MIT'
 
-  spec.add_dependency 'httparty', "~> 0.16.0"
+  spec.add_dependency 'httparty', ">= 0.16", "< 0.22"
   spec.add_dependency "json", "~> 2.0"
 
   spec.add_development_dependency "rspec", "~> 3.8"