diff --git a/Gemfile.lock b/Gemfile.lock
index f5513842..ff1c1efe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ PATH
       dragonfly (>= 1.2, < 1.5)
       duktape (~> 2.0.1.1)
       execjs (~> 2.8.1)
-      httparty (~> 0.16.0)
+      httparty (>= 0.16, < 0.22)
       kramdown (~> 2.3.0)
       liquid (~> 4.0.4)
       locomotivecms_common (~> 0.5.0)
@@ -61,8 +61,8 @@ GEM
     haml (5.2.2)
       temple (>= 0.8.0)
       tilt
-    httparty (0.16.4)
-      mime-types (~> 3.0)
+    httparty (0.21.0)
+      mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
diff --git a/locomotivecms_steam.gemspec b/locomotivecms_steam.gemspec
index 80e8804c..ae9bc08d 100644
--- a/locomotivecms_steam.gemspec
+++ b/locomotivecms_steam.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'nokogiri',               '~> 1.14.2'
   spec.add_dependency 'sanitize',               '~> 6.0.1'
   spec.add_dependency 'morphine',               '~> 0.1.1'
-  spec.add_dependency 'httparty',               '~> 0.16.0'
+  spec.add_dependency 'httparty',               '>= 0.16', '< 0.22'
   spec.add_dependency 'chronic',                '~> 0.10.2'
   spec.add_dependency 'bcrypt',                 '~> 3.1.11'
   spec.add_dependency 'multi_json',             '~> 1.15.0'