diff --git a/jhipster/jhipster-microservice/gateway-app/src/main/webapp/bower_components/bootstrap/Gemfile b/jhipster/jhipster-microservice/gateway-app/src/main/webapp/bower_components/bootstrap/Gemfile
index feb162291c38..96a58e34c26a 100644
--- a/jhipster/jhipster-microservice/gateway-app/src/main/webapp/bower_components/bootstrap/Gemfile
+++ b/jhipster/jhipster-microservice/gateway-app/src/main/webapp/bower_components/bootstrap/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
 group :development, :test do
-  gem 'jekyll', '~> 3.1.2'
-  gem 'jekyll-sitemap', '~> 0.11.0'
+  gem 'jekyll', '~> 3.9.0'
+  gem 'jekyll-sitemap', '~> 0.12.0'
 end
diff --git a/jhipster/jhipster-microservice/gateway-app/src/main/webapp/bower_components/bootstrap/Gemfile.lock b/jhipster/jhipster-microservice/gateway-app/src/main/webapp/bower_components/bootstrap/Gemfile.lock
index 1b5dc3e9023d..95314cb1e1eb 100644
--- a/jhipster/jhipster-microservice/gateway-app/src/main/webapp/bower_components/bootstrap/Gemfile.lock
+++ b/jhipster/jhipster-microservice/gateway-app/src/main/webapp/bower_components/bootstrap/Gemfile.lock
@@ -1,43 +1,69 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.4.0)
-    colorator (0.1)
-    ffi (1.9.14-x64-mingw32)
-    jekyll (3.1.6)
-      colorator (~> 0.1)
+    addressable (2.8.2)
+      public_suffix (>= 2.0.2, < 6.0)
+    colorator (1.1.0)
+    concurrent-ruby (1.2.2)
+    em-websocket (0.5.3)
+      eventmachine (>= 0.12.9)
+      http_parser.rb (~> 0)
+    eventmachine (1.2.7)
+    eventmachine (1.2.7-x64-mingw32)
+    ffi (1.15.5)
+    ffi (1.15.5-x64-mingw32)
+    forwardable-extended (2.6.0)
+    http_parser.rb (0.8.0)
+    i18n (1.12.0)
+      concurrent-ruby (~> 1.0)
+    jekyll (3.9.3)
+      addressable (~> 2.4)
+      colorator (~> 1.0)
+      em-websocket (~> 0.5)
+      i18n (>= 0.7, < 2)
       jekyll-sass-converter (~> 1.0)
-      jekyll-watch (~> 1.1)
-      kramdown (~> 1.3)
-      liquid (~> 3.0)
+      jekyll-watch (~> 2.0)
+      kramdown (>= 1.17, < 3)
+      liquid (~> 4.0)
       mercenary (~> 0.3.3)
-      rouge (~> 1.7)
+      pathutil (~> 0.9)
+      rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
-    jekyll-sass-converter (1.4.0)
+    jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
-    jekyll-sitemap (0.11.0)
-      addressable (~> 2.4.0)
-    jekyll-watch (1.4.0)
-      listen (~> 3.0, < 3.1)
-    kramdown (1.11.1)
-    liquid (3.0.6)
-    listen (3.0.8)
+    jekyll-sitemap (0.12.0)
+      jekyll (~> 3.3)
+    jekyll-watch (2.2.1)
+      listen (~> 3.0)
+    kramdown (2.4.0)
+      rexml
+    liquid (4.0.4)
+    listen (3.8.0)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    mercenary (0.3.6)
+    pathutil (0.16.2)
+      forwardable-extended (~> 2.6)
+    public_suffix (5.0.1)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
+    rexml (3.2.5)
+    rouge (3.30.0)
+    safe_yaml (1.0.5)
+    sass (3.7.4)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    mercenary (0.3.6)
-    rb-fsevent (0.9.7)
-    rb-inotify (0.9.7)
-      ffi (>= 0.5.0)
-    rouge (1.11.1)
-    safe_yaml (1.0.4)
-    sass (3.4.22)
 
 PLATFORMS
+  ruby
   x64-mingw32
 
 DEPENDENCIES
-  jekyll (~> 3.1.2)
-  jekyll-sitemap (~> 0.11.0)
+  jekyll (~> 3.9.0)
+  jekyll-sitemap (~> 0.12.0)
 
 BUNDLED WITH
-   1.12.5
+   1.17.3