diff --git a/Gemfile b/Gemfile
index aefbd8c..7dfd3b5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -33,6 +33,6 @@ gem 'tilt', '2.0.2'
 gem 'rb-inotify', '0.9.7', :platforms => [:ruby, :jruby]
 gem 'bootstrap-sass', '< 3.4'
 gem 'font-awesome-sass', '<= 5'
-gem 'tzinfo', '1.2.2', :group => :test
+gem 'tzinfo', '1.2.10', :group => :test
 gem 'rake', '12.3.3', :group => :test
 gem 'html-proofer', '3.0.2', :group => :test
diff --git a/Gemfile.lock b/Gemfile.lock
index 12e488b..2ae3960 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -150,7 +150,7 @@ GEM
     tilt (2.0.2)
     typhoeus (0.8.0)
       ethon (>= 0.8.0)
-    tzinfo (1.2.2)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext
@@ -172,7 +172,7 @@ DEPENDENCIES
   rb-inotify (= 0.9.7)
   slim (= 3.0.6)
   tilt (= 2.0.2)
-  tzinfo (= 1.2.2)
+  tzinfo (= 1.2.10)
 
 BUNDLED WITH
    2.1.4