diff --git a/Gemfile b/Gemfile
index 1b6f1b60..7009a518 100644
--- a/Gemfile
+++ b/Gemfile
@@ -85,7 +85,6 @@ end
 gem 'bootstrap3-datetimepicker-rails', '~> 3.0.2'
 gem 'jquery-datatables-rails', '~> 2.2.1'
 # for charts
-gem 'd3_rails'
 gem 'chart-js-rails'
 
 # for user avatars
diff --git a/Gemfile.lock b/Gemfile.lock
index ef40e3bf..5dd6fdd0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -131,8 +131,6 @@ 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)
     debug_inspector (0.0.2)
@@ -496,7 +494,6 @@ DEPENDENCIES
   cocoon
   country_select!
   coveralls
-  d3_rails
   daemons
   database_cleaner
   delayed_job_active_record
diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index 7cac4c52..98c9fbb1 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -18,7 +18,6 @@
 //= require cocoon
 //= require bootstrap
 //= require Chart
-//= require d3
 //= require osem
 //= require osem-dashboard
 //= require ahoy