diff --git a/Gemfile b/Gemfile
index f2a6cff..bf05083 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source "http://rubygems.org"
 gem 'slack-ruby-client', '~> 0.7'
 gem 'dogapi', '~> 1.23'
-gem 'virtus', '~> 1.0'
+gem 'virtus', '~> 1.0', '>= 1.0.5'
 gem 'facets', '~> 3.1'
 gem 'thor',   '~> 0.19'
 gem 'aws-sdk','~> 2.6'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6ae04c5..be8a4aa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -47,7 +47,7 @@ GEM
       json
       websocket-driver
     thor (0.19.1)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
     virtus (1.0.5)
@@ -69,7 +69,7 @@ DEPENDENCIES
   json (~> 2.0)
   slack-ruby-client (~> 0.7)
   thor (~> 0.19)
-  virtus (~> 1.0)
+  virtus (~> 1.0, >= 1.0.5)
 
 BUNDLED WITH
-   1.12.5
+   2.7.2