diff --git a/Gemfile.lock b/Gemfile.lock
index fe7521e..4c9a07c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     peatio-ndc (0.1.3)
-      activesupport (~> 5.2.3)
+      activesupport (>= 5.2.3, < 7.1.0)
       better-faraday (~> 1.0.5)
       faraday (~> 0.15.4)
       memoist (~> 0.16.0)
@@ -11,34 +11,35 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (5.2.4.2)
-      activesupport (= 5.2.4.2)
-    activesupport (5.2.4.2)
+    activemodel (5.2.8.1)
+      activesupport (= 5.2.8.1)
+    activesupport (5.2.8.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
-    amq-protocol (2.3.1)
+    amq-protocol (2.3.2)
     amqp (1.8.0)
       amq-protocol (>= 2.2.0)
       eventmachine
     better-faraday (1.0.8)
       activesupport (>= 4.0, < 6.0)
       faraday (~> 0.12)
-    bunny (2.15.0)
+    bunny (2.20.2)
       amq-protocol (~> 2.3, >= 2.3.1)
+      sorted_set (~> 1, >= 1.0.2)
     byebug (11.1.3)
-    clamp (1.3.1)
+    clamp (1.3.2)
     coderay (1.1.2)
-    concurrent-ruby (1.1.6)
+    concurrent-ruby (1.1.10)
     cookiejar (0.3.3)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
-    daemons (1.3.1)
+    daemons (1.4.1)
     diff-lcs (1.3)
-    em-http-request (1.1.5)
+    em-http-request (1.1.7)
       addressable (>= 2.3.4)
       cookiejar (!= 0.3.1)
       em-socksify (>= 0.3)
@@ -48,37 +49,37 @@ GEM
       eventmachine (>= 1.0.0.beta.4)
     em-synchrony (1.0.6)
       eventmachine (>= 1.0.0.beta.1)
-    em-websocket (0.5.1)
+    em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
-      http_parser.rb (~> 0.6.0)
+      http_parser.rb (~> 0)
     eventmachine (1.2.7)
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     faraday_middleware (0.13.1)
       faraday (>= 0.7.4, < 1.0)
-    faye (1.2.5)
+    faye (1.4.0)
       cookiejar (>= 0.3.0)
-      em-http-request (>= 0.3.0)
+      em-http-request (>= 1.1.6)
       eventmachine (>= 0.12.0)
-      faye-websocket (>= 0.9.1)
+      faye-websocket (>= 0.11.0)
       multi_json (>= 1.0.0)
       rack (>= 1.0.0)
       websocket-driver (>= 0.5.1)
-    faye-websocket (0.10.9)
+    faye-websocket (0.11.1)
       eventmachine (>= 0.12.0)
       websocket-driver (>= 0.5.1)
     hashdiff (1.0.1)
-    http_parser.rb (0.6.0)
-    i18n (1.8.2)
+    http_parser.rb (0.8.0)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
-    jwt (2.2.1)
+    jwt (2.6.0)
     memoist (0.16.2)
     method_source (1.0.0)
-    minitest (5.14.1)
+    minitest (5.17.0)
     mocha (1.11.2)
-    multi_json (1.14.1)
-    multipart-post (2.1.1)
-    mysql2 (0.5.3)
+    multi_json (1.15.0)
+    multipart-post (2.2.3)
+    mysql2 (0.5.4)
     peatio (2.4.3)
       activemodel (> 5.2, <= 6.0.0)
       amqp
@@ -93,7 +94,7 @@ GEM
       mysql2
       prometheus-client
       thin
-    prometheus-client (2.0.0)
+    prometheus-client (4.0.0)
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
@@ -101,8 +102,9 @@ GEM
       byebug (~> 11.0)
       pry (~> 0.13.0)
     public_suffix (4.0.5)
-    rack (2.2.2)
+    rack (2.2.6.2)
     rake (10.5.0)
+    rbtree (0.4.6)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)
@@ -117,20 +119,24 @@ GEM
       rspec-support (~> 3.9.0)
     rspec-support (3.9.3)
     safe_yaml (1.0.5)
-    thin (1.7.2)
+    set (1.0.3)
+    sorted_set (1.0.3)
+      rbtree
+      set (~> 1.0)
+    thin (1.8.1)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
     thread_safe (0.3.6)
-    tzinfo (1.2.7)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     webmock (3.8.3)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
-    websocket-driver (0.7.1)
+    websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.4)
+    websocket-extensions (0.1.5)
 
 PLATFORMS
   ruby
diff --git a/peatio-ndc.gemspec b/peatio-ndc.gemspec
index bd34362..3a085a7 100644
--- a/peatio-ndc.gemspec
+++ b/peatio-ndc.gemspec
@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "activesupport", "~> 5.2.3"
+  spec.add_dependency "activesupport", ">= 5.2.3", "< 7.1.0"
   spec.add_dependency "better-faraday", "~> 1.0.5"
   spec.add_dependency "faraday", "~> 0.15.4"
   spec.add_dependency "memoist", "~> 0.16.0"