diff --git a/api/ruby/basics-of-authentication/Gemfile b/api/ruby/basics-of-authentication/Gemfile
index f33cf136c..e8b6acaf7 100644
--- a/api/ruby/basics-of-authentication/Gemfile
+++ b/api/ruby/basics-of-authentication/Gemfile
@@ -2,4 +2,4 @@ source "http://rubygems.org"
 
 gem "json",        "1.7.7"
 gem 'sinatra',     '~> 1.3.5'
-gem 'rest-client', '~> 1.6.3'
+gem 'rest-client', '~> 1.8.0'
diff --git a/api/ruby/basics-of-authentication/Gemfile.lock b/api/ruby/basics-of-authentication/Gemfile.lock
index 296978587..55d3c1053 100644
--- a/api/ruby/basics-of-authentication/Gemfile.lock
+++ b/api/ruby/basics-of-authentication/Gemfile.lock
@@ -1,23 +1,33 @@
 GEM
   remote: http://rubygems.org/
   specs:
+    domain_name (0.5.20190701)
+      unf (>= 0.0.5, < 1.0.0)
+    http-cookie (1.0.5)
+      domain_name (~> 0.5)
     json (1.7.7)
-    mime-types (1.21)
+    mime-types (2.99.3)
+    netrc (0.11.0)
     rack (1.5.2)
     rack-protection (1.3.2)
       rack
-    rest-client (1.6.7)
-      mime-types (>= 1.16)
+    rest-client (1.8.0)
+      http-cookie (>= 1.0.2, < 2.0)
+      mime-types (>= 1.16, < 3.0)
+      netrc (~> 0.7)
     sinatra (1.3.5)
       rack (~> 1.4)
       rack-protection (~> 1.3)
       tilt (~> 1.3, >= 1.3.3)
     tilt (1.3.3)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.8.2)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   json (= 1.7.7)
-  rest-client (~> 1.6.3)
+  rest-client (~> 1.8.0)
   sinatra (~> 1.3.5)