diff --git a/Gemfile.lock b/Gemfile.lock
index 7c32c68..4eb9c75 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,14 +2,19 @@ PATH
   remote: .
   specs:
     zone_ranger (0.0.1)
-      activesupport (~> 3.0.20)
+      activesupport (>= 3.0.20, < 8)
       i18n
-      tzinfo (~> 0.3.35)
+      tzinfo (>= 0.3.35)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (3.0.20)
+    activesupport (7.0.4.3)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+    concurrent-ruby (1.2.2)
     coveralls (0.6.9)
       multi_json (~> 1.3)
       rest-client
@@ -17,8 +22,10 @@ GEM
       term-ansicolor
       thor
     diff-lcs (1.2.4)
-    i18n (0.6.5)
+    i18n (1.12.0)
+      concurrent-ruby (~> 1.0)
     mime-types (1.25)
+    minitest (5.18.0)
     multi_json (1.8.0)
     rake (10.1.0)
     rest-client (1.6.7)
@@ -40,7 +47,8 @@ GEM
     thor (0.18.1)
     timecop (0.3.5)
     tins (0.9.0)
-    tzinfo (0.3.37)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
 
 PLATFORMS
   ruby
diff --git a/zone_ranger.gemspec b/zone_ranger.gemspec
index d2f38c5..59a3364 100644
--- a/zone_ranger.gemspec
+++ b/zone_ranger.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "timecop", "~> 0.3.5"
   spec.add_development_dependency "coveralls"
 
-  spec.add_runtime_dependency "activesupport", ">= 3.0.20", "< 5"
+  spec.add_runtime_dependency "activesupport", ">= 3.0.20", "< 8"
   spec.add_runtime_dependency 'i18n' # required by active_support
   spec.add_runtime_dependency 'tzinfo', '>= 0.3.35'
 end