diff --git a/Gemfile.lock b/Gemfile.lock
index b498ba0..25e4d60 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,27 +3,27 @@ PATH
   specs:
     crypto_yellowme (0.4.0)
       activemodel (~> 5.2)
-      activesupport (~> 5.0)
+      activesupport (>= 5, < 7)
       bcrypt (~> 3.1.7)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (5.2.4.1)
-      activesupport (= 5.2.4.1)
-    activesupport (5.2.4.1)
+    activemodel (5.2.4.3)
+      activesupport (= 5.2.4.3)
+    activesupport (5.2.4.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     bcrypt (3.1.13)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.6)
     diff-lcs (1.3)
     docile (1.3.2)
-    i18n (1.7.0)
+    i18n (1.8.2)
       concurrent-ruby (~> 1.0)
     json (2.2.0)
-    minitest (5.13.0)
+    minitest (5.14.1)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
@@ -43,7 +43,7 @@ GEM
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
     thread_safe (0.3.6)
-    tzinfo (1.2.6)
+    tzinfo (1.2.7)
       thread_safe (~> 0.1)
 
 PLATFORMS
diff --git a/crypto.gemspec b/crypto.gemspec
index 30da68c..d18cbff 100644
--- a/crypto.gemspec
+++ b/crypto.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
   spec.license      = 'MIT'
 
   spec.add_dependency "bcrypt", "~> 3.1.7"
-  spec.add_dependency 'activesupport', '~> 5.0'
+  spec.add_dependency 'activesupport', '>= 5', '< 7'
   spec.add_dependency "activemodel", "~> 5.2"
 
   spec.add_development_dependency "rspec", "~> 3.8"