diff --git a/Gemfile.lock b/Gemfile.lock
index dd90681..0011ca5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     jazz_model (0.1.0)
       activerecord (~> 3.1.0)
-      activesupport (~> 3.1.0)
+      activesupport (>= 3.1, < 5.3)
       acts_as_list (>= 0.1.2)
       acts_as_tree (>= 0.1.1)
       sqlite3 (~> 1.3.0)
@@ -11,24 +11,28 @@ PATH
 GEM
   remote: http://rubygems.org/
   specs:
-    activemodel (3.1.4)
-      activesupport (= 3.1.4)
+    activemodel (3.1.12)
+      activesupport (= 3.1.12)
       builder (~> 3.0.0)
       i18n (~> 0.6)
-    activerecord (3.1.4)
-      activemodel (= 3.1.4)
-      activesupport (= 3.1.4)
+    activerecord (3.1.12)
+      activemodel (= 3.1.12)
+      activesupport (= 3.1.12)
       arel (~> 2.2.3)
       tzinfo (~> 0.3.29)
-    activesupport (3.1.4)
+    activesupport (3.1.12)
       multi_json (~> 1.0)
-    acts_as_list (0.1.8)
-    acts_as_tree (0.1.1)
+    acts_as_list (0.9.19)
+      activerecord (>= 3.0)
+    acts_as_tree (2.9.0)
+      activerecord (>= 3.0.0)
     arel (2.2.3)
     builder (3.0.4)
+    concurrent-ruby (1.1.5)
     diff-lcs (1.1.2)
-    i18n (0.6.1)
-    multi_json (1.5.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
+    multi_json (1.13.1)
     rspec (2.4.0)
       rspec-core (~> 2.4.0)
       rspec-expectations (~> 2.4.0)
@@ -37,8 +41,8 @@ GEM
     rspec-expectations (2.4.0)
       diff-lcs (~> 1.1.2)
     rspec-mocks (2.4.0)
-    sqlite3 (1.3.6)
-    tzinfo (0.3.35)
+    sqlite3 (1.3.13)
+    tzinfo (0.3.55)
 
 PLATFORMS
   ruby
diff --git a/jazz_model.gemspec b/jazz_model.gemspec
index bbc2ec2..e15b1e3 100644
--- a/jazz_model.gemspec
+++ b/jazz_model.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |s|
   s.required_rubygems_version = ">= 1.3.4"
   
   s.add_dependency("activerecord", ["~> 3.1.0"])
-  s.add_dependency("activesupport", ["~> 3.1.0"])
+  s.add_dependency("activesupport", ">= 3.1", "< 5.3")
   s.add_dependency("acts_as_list", [">= 0.1.2"])
   s.add_dependency("acts_as_tree", [">= 0.1.1"])
   s.add_dependency("sqlite3", ["~> 1.3.0"])