diff --git a/Gemfile b/Gemfile
index 9720907cd..7f9d6d473 100644
--- a/Gemfile
+++ b/Gemfile
@@ -167,7 +167,3 @@ group :test do
   gem "webmock", "~> 3.9", require: false # WebMock allows stubbing HTTP requests and setting expectations on HTTP requests
   gem "zonebie", "~> 0.6.1" # Runs your tests in a random timezone
 end
-
-group :doc do
-  gem "sdoc", "~> 1.1" # rdoc generator html with javascript search index
-end
diff --git a/Gemfile.lock b/Gemfile.lock
index 61f7040cf..4237ae2b4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -592,7 +592,6 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rdoc (6.2.1)
     recaptcha (5.6.0)
       json
     redcarpet (3.5.0)
@@ -706,8 +705,6 @@ GEM
       addressable (>= 2.3.5)
       faraday (> 0.8, < 2.0)
     sax-machine (1.3.2)
-    sdoc (1.1.0)
-      rdoc (>= 5.0)
     selectize-rails (0.12.6)
     selenium-webdriver (3.142.7)
       childprocess (>= 0.5, < 4.0)
@@ -956,7 +953,6 @@ DEPENDENCIES
   rubyzip (~> 2.3)
   s3_direct_upload (~> 0.1)
   sassc-rails (~> 2.1.2)
-  sdoc (~> 1.1)
   shoulda-matchers (~> 4.4.1)
   sidekiq (~> 6.1.2)
   sidekiq-cron (~> 1.1)
diff --git a/vendor/cache/rdoc-6.2.1.gem b/vendor/cache/rdoc-6.2.1.gem
deleted file mode 100644
index f806e3179..000000000
Binary files a/vendor/cache/rdoc-6.2.1.gem and /dev/null differ
diff --git a/vendor/cache/sdoc-1.1.0.gem b/vendor/cache/sdoc-1.1.0.gem
deleted file mode 100644
index fbb93abc7..000000000
Binary files a/vendor/cache/sdoc-1.1.0.gem and /dev/null differ