diff --git a/Gemfile b/Gemfile
index 3bbfec2b..0032da8c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -76,7 +76,6 @@ gem 'prawn_rails'
 gem 'axlsx_rails'
 
 # for charts
-gem 'd3_rails'
 gem 'chart-js-rails'
 
 # as error catcher
diff --git a/Gemfile.lock b/Gemfile.lock
index 6a948871..6e367b10 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -119,8 +119,6 @@ GEM
       term-ansicolor
       thor
     currencies (0.4.2)
-    d3_rails (3.4.6)
-      railties (>= 3.1.0)
     daemons (1.1.9)
     database_cleaner (1.3.0)
     debugger-linecache (1.2.0)
@@ -452,7 +450,6 @@ DEPENDENCIES
   cocoon
   country_select!
   coveralls
-  d3_rails
   daemons
   database_cleaner
   delayed_job_active_record
@@ -504,3 +501,6 @@ DEPENDENCIES
   turbolinks
   uglifier (>= 1.3.0)
   whenever
+
+BUNDLED WITH
+   1.10.5