diff --git a/Gemfile b/Gemfile
index 33d9d3b..f0fca15 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
 source "https://rubygems.org"
 
 gem 'github-pages', group: :jekyll_plugins
+
+gem "webrick", "~> 1.8"
diff --git a/Gemfile.lock b/Gemfile.lock
index 48ff438..a6231be 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,66 +1,55 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (6.0.6.1)
+    activesupport (7.1.3.4)
+      base64
+      bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-      zeitwerk (~> 2.2, >= 2.2.2)
-    addressable (2.8.0)
-      public_suffix (>= 2.0.2, < 5.0)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      mutex_m
+      tzinfo (~> 2.0)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
+    base64 (0.2.0)
+    bigdecimal (3.1.8)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
-    coffee-script-source (1.11.1)
+    coffee-script-source (1.12.2)
     colorator (1.1.0)
     commonmarker (0.23.10)
-    concurrent-ruby (1.2.0)
-    dnsruby (1.61.9)
-      simpleidn (~> 0.1)
+    concurrent-ruby (1.3.3)
+    connection_pool (2.4.1)
+    dnsruby (1.72.1)
+      simpleidn (~> 0.2.1)
+    drb (2.2.1)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
-    ethon (0.15.0)
+    ethon (0.16.0)
       ffi (>= 1.15.0)
     eventmachine (1.2.7)
-    execjs (2.8.1)
-    faraday (1.10.0)
-      faraday-em_http (~> 1.0)
-      faraday-em_synchrony (~> 1.0)
-      faraday-excon (~> 1.1)
-      faraday-httpclient (~> 1.0)
-      faraday-multipart (~> 1.0)
-      faraday-net_http (~> 1.0)
-      faraday-net_http_persistent (~> 1.0)
-      faraday-patron (~> 1.0)
-      faraday-rack (~> 1.0)
-      faraday-retry (~> 1.0)
-      ruby2_keywords (>= 0.0.4)
-    faraday-em_http (1.0.0)
-    faraday-em_synchrony (1.0.0)
-    faraday-excon (1.1.0)
-    faraday-httpclient (1.0.1)
-    faraday-multipart (1.0.3)
-      multipart-post (>= 1.2, < 3)
-    faraday-net_http (1.0.1)
-    faraday-net_http_persistent (1.2.0)
-    faraday-patron (1.0.0)
-    faraday-rack (1.0.0)
-    faraday-retry (1.0.3)
-    ffi (1.15.5)
+    execjs (2.9.1)
+    faraday (2.9.2)
+      faraday-net_http (>= 2.0, < 3.2)
+    faraday-net_http (3.1.0)
+      net-http
+    ffi (1.17.0)
     forwardable-extended (2.6.0)
-    gemoji (3.0.1)
-    github-pages (226)
-      github-pages-health-check (= 1.17.9)
-      jekyll (= 3.9.2)
-      jekyll-avatar (= 0.7.0)
-      jekyll-coffeescript (= 1.1.1)
-      jekyll-commonmark-ghpages (= 0.2.0)
-      jekyll-default-layout (= 0.1.4)
-      jekyll-feed (= 0.15.1)
+    gemoji (4.1.0)
+    github-pages (231)
+      github-pages-health-check (= 1.18.2)
+      jekyll (= 3.9.5)
+      jekyll-avatar (= 0.8.0)
+      jekyll-coffeescript (= 1.2.2)
+      jekyll-commonmark-ghpages (= 0.4.0)
+      jekyll-default-layout (= 0.1.5)
+      jekyll-feed (= 0.17.0)
       jekyll-gist (= 1.5.0)
-      jekyll-github-metadata (= 2.13.0)
+      jekyll-github-metadata (= 2.16.1)
       jekyll-include-cache (= 0.2.1)
       jekyll-mentions (= 1.6.0)
       jekyll-optional-front-matter (= 0.3.2)
@@ -87,32 +76,32 @@ GEM
       jekyll-theme-tactile (= 0.2.0)
       jekyll-theme-time-machine (= 0.2.0)
       jekyll-titles-from-headings (= 0.5.3)
-      jemoji (= 0.12.0)
-      kramdown (= 2.3.2)
+      jemoji (= 0.13.0)
+      kramdown (= 2.4.0)
       kramdown-parser-gfm (= 1.1.0)
-      liquid (= 4.0.3)
+      liquid (= 4.0.4)
       mercenary (~> 0.3)
       minima (= 2.5.1)
-      nokogiri (>= 1.13.4, < 2.0)
-      rouge (= 3.26.0)
+      nokogiri (>= 1.13.6, < 2.0)
+      rouge (= 3.30.0)
       terminal-table (~> 1.4)
-    github-pages-health-check (1.17.9)
+    github-pages-health-check (1.18.2)
       addressable (~> 2.3)
       dnsruby (~> 1.60)
-      octokit (~> 4.0)
-      public_suffix (>= 3.0, < 5.0)
+      octokit (>= 4, < 8)
+      public_suffix (>= 3.0, < 6.0)
       typhoeus (~> 1.3)
-    html-pipeline (2.14.1)
+    html-pipeline (2.14.3)
       activesupport (>= 2)
       nokogiri (>= 1.4)
     http_parser.rb (0.8.0)
-    i18n (0.9.5)
+    i18n (1.14.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.9.2)
+    jekyll (3.9.5)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
-      i18n (~> 0.7)
+      i18n (>= 0.7, < 2)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 2.0)
       kramdown (>= 1.17, < 3)
@@ -121,27 +110,27 @@ GEM
       pathutil (~> 0.9)
       rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
-    jekyll-avatar (0.7.0)
+    jekyll-avatar (0.8.0)
       jekyll (>= 3.0, < 5.0)
-    jekyll-coffeescript (1.1.1)
+    jekyll-coffeescript (1.2.2)
       coffee-script (~> 2.2)
-      coffee-script-source (~> 1.11.1)
+      coffee-script-source (~> 1.12)
     jekyll-commonmark (1.4.0)
       commonmarker (~> 0.22)
-    jekyll-commonmark-ghpages (0.2.0)
-      commonmarker (~> 0.23.4)
+    jekyll-commonmark-ghpages (0.4.0)
+      commonmarker (~> 0.23.7)
       jekyll (~> 3.9.0)
       jekyll-commonmark (~> 1.4.0)
-      rouge (>= 2.0, < 4.0)
-    jekyll-default-layout (0.1.4)
-      jekyll (~> 3.0)
-    jekyll-feed (0.15.1)
+      rouge (>= 2.0, < 5.0)
+    jekyll-default-layout (0.1.5)
+      jekyll (>= 3.0, < 5.0)
+    jekyll-feed (0.17.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-gist (1.5.0)
       octokit (~> 4.2)
-    jekyll-github-metadata (2.13.0)
+    jekyll-github-metadata (2.16.1)
       jekyll (>= 3.4, < 5.0)
-      octokit (~> 4.0, != 4.4.0)
+      octokit (>= 4, < 7, != 4.4.0)
     jekyll-include-cache (0.2.1)
       jekyll (>= 3.7, < 5.0)
     jekyll-mentions (1.6.0)
@@ -212,43 +201,44 @@ GEM
       jekyll (>= 3.3, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    jemoji (0.12.0)
-      gemoji (~> 3.0)
+    jemoji (0.13.0)
+      gemoji (>= 3, < 5)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    kramdown (2.3.2)
+    kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
-    liquid (4.0.3)
-    listen (3.7.1)
+    liquid (4.0.4)
+    listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.8.6)
+    mini_portile2 (2.8.7)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    minitest (5.17.0)
-    multipart-post (2.1.1)
-    nokogiri (1.16.5)
+    minitest (5.24.0)
+    mutex_m (0.2.0)
+    net-http (0.4.1)
+      uri
+    nokogiri (1.16.6)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    octokit (4.22.0)
-      faraday (>= 0.9)
-      sawyer (~> 0.8.0, >= 0.5.3)
+    octokit (4.25.1)
+      faraday (>= 1, < 3)
+      sawyer (~> 0.9)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.7)
-    racc (1.7.3)
-    rb-fsevent (0.11.1)
-    rb-inotify (0.10.1)
+    public_suffix (5.1.1)
+    racc (1.8.0)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
-    rouge (3.26.0)
-    ruby2_keywords (0.0.5)
+    rexml (3.3.1)
+      strscan
+    rouge (3.30.0)
     rubyzip (2.3.2)
     safe_yaml (1.0.5)
     sass (3.7.4)
@@ -256,30 +246,27 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    sawyer (0.8.2)
+    sawyer (0.9.2)
       addressable (>= 2.3.5)
-      faraday (> 0.8, < 2.0)
-    simpleidn (0.2.1)
-      unf (~> 0.1.4)
+      faraday (>= 0.17.3, < 3)
+    simpleidn (0.2.3)
     strscan (3.1.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    thread_safe (0.3.6)
-    typhoeus (1.4.0)
+    typhoeus (1.4.1)
       ethon (>= 0.9.0)
-    tzinfo (1.2.11)
-      thread_safe (~> 0.1)
-    unf (0.1.4)
-      unf_ext
-    unf_ext (0.0.8.1)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
     unicode-display_width (1.8.0)
-    zeitwerk (2.6.7)
+    uri (0.13.0)
+    webrick (1.8.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   github-pages
+  webrick (~> 1.8)
 
 BUNDLED WITH
    2.1.4
diff --git a/_sites/mqtt-specification.md b/_sites/mqtt-specification.md
index abebe8b..770ed85 100644
--- a/_sites/mqtt-specification.md
+++ b/_sites/mqtt-specification.md
@@ -41,8 +41,8 @@ MQTT is an OASIS standard. The specification is managed by the OASIS MQTT Techni
       formerly known as MQTT-S, is available<br/>
       &gt; <a href="https://www.oasis-open.org/committees/document.php?document_id=66091&wg_abbrev=mqtt">here</a>
       <br/><br/>
-      MQTT for Sensor Networks is aimed at embedded devices on non-TCP/IP networks, such as Zigbee. MQTT-SN is a publish/subscribe messaging protocol for wireless sensor networks (WSN), with the aim of extending the MQTT protocol beyond the reach of TCP/IP infrastructure for Sensor and Actuator solutions.<br/>
-      <a href="http://www.zurich.ibm.com/sys/energy/middleware.html">Read more about it at the IBM Zurich Research website</a>.
+      MQTT for Sensor Networks is aimed at embedded devices on non-TCP/IP networks, such as Zigbee. MQTT-SN is a publish/subscribe messaging protocol for wireless sensor networks (WSN), with the aim of extending the MQTT protocol beyond the reach of TCP/IP infrastructure for Sensor and Actuator solutions.
+      Read more about it on <a href="https://www.hivemq.com/blog/mqtt-sn-smart-choice-for-iiot/" target="_blank">HiveMQ’s blog</a>. 
    </article>
 </section>
 </section>
diff --git a/_sites/use-cases.md b/_sites/use-cases.md
index 5d9262a..8ed0c24 100644
--- a/_sites/use-cases.md
+++ b/_sites/use-cases.md
@@ -14,8 +14,8 @@ MQTT is used in a large variety of use cases and industries.
          <div class="use-case-description">
             <h2 id="automotive">Automotive</h2>
             <ul>
-               <li>HiveMQ: <a href="https://www.hivemq.com/case-studies/bmw-mobility-services/">BMW Car-Sharing application</a> relies on HiveMQ for reliable connectivity.</li>
-               <li>EMQ helps <a href="https://www.emqx.com/en/blog/emqx-in-volkswagen-iov">SAIC Volkswagen building IoV platform</a>.</li>
+               <li>HiveMQ: <a href="https://www.hivemq.com/case-studies/bmw-mobility-services/" target="_blank">BMW Car-Sharing application</a> relies on HiveMQ for reliable connectivity</li>
+               <li>EMQ helps <a href="https://www.emqx.com/en/customers/saic-volkswagen" target="_blank">SAIC Volkswagen building IoV platform</a></li>
             </ul>
          </div>
       </article>
@@ -25,7 +25,7 @@ MQTT is used in a large variety of use cases and industries.
          <div class="use-case-description">
             <h2 id="logistics">Logistics</h2>
             <ul>
-               <li>Reliable IoT communication enables real-time monitoring of <a href="https://www.hivemq.com/case-studies/matternet/">Matternet’s autonomous drones</a>.</li>
+               <li><a href="https://www.hivemq.com/case-studies/large-transportation/" target="_blank">Transportation & Logistics company</a> cuts costs and improves asset tracking</li>
             </ul>
          </div>
       </article>
@@ -35,10 +35,7 @@ MQTT is used in a large variety of use cases and industries.
          <div class="use-case-description">
             <h2 id="manufacturing">Manufacturing</h2>
             <ul>
-               <li>MQTT Implementation on <a href="https://www.bevywise.com/blog/iot-success-stories-mqtt-broker-celikler-holding/">Celikler Holding's Power Plant Monitoring</a>.</li>
-            </ul>
-            <ul>
-               <li>Transforming Manufacturing Efficiency: <a href="https://www.bevywise.com/mqtt-usecases/manufacturing-solutions.html">The Power of MQTT in Industrial Solutions</a>.</li>
+               <li>Transforming Manufacturing Efficiency: <a href="https://www.bevywise.com/mqtt-usecases/manufacturing-solutions.html" target="_blank">The Power of MQTT in Industrial Solutions</a></li>
             </ul>
          </div>
       </article>
@@ -48,9 +45,9 @@ MQTT is used in a large variety of use cases and industries.
          <div class="use-case-description">
             <h2 id="smarthome">Smart Home</h2>
             <ul>
-               <li>IBM Telemetry use case: <a href="https://www.ibm.com/support/knowledgecenter/en/SSFKSJ_8.0.0/com.ibm.mq.pro.doc/q002790_.htm">Home energy monitoring and control</a></li>
-               <li>IBM Telemetry use case: <a href="https://www.ibm.com/support/knowledgecenter/en/SSFKSJ_8.0.0/com.ibm.mq.pro.doc/q002780_.htm">Home patient monitoring</a></li>
-               <li>The eFon Technology's <a href="https://www.bevywise.com/blog/iot-home-security-system-mqtt-broker/">Smart Home security system</a> trusts Bevywise MQTT Solution</li>
+               <li>IBM Telemetry use case: <a href="https://www.ibm.com/docs/en/ibm-mq/latest?topic=cases-telemetry-use-case-home-energy-monitoring-control" target="_blank">Home energy monitoring and control</a></li>
+               <li>IBM Telemetry use case: <a href="https://www.ibm.com/docs/en/ibm-mq/latest?topic=cases-telemetry-use-case-home-patient-monitoring" target="_blank">Home patient monitoring</a></li>
+               <li>The eFon Technology's <a href="https://www.bevywise.com/blog/iot-home-security-system-mqtt-broker/" target="_blank">Smart Home security system</a> trusts Bevywise MQTT solution</li>
             </ul>
          </div>
       </article>
@@ -58,9 +55,11 @@ MQTT is used in a large variety of use cases and industries.
       <article class="use-case">
          <img src="{{ '/assets/img/oil-and-gas.jpg' | relative_url }}" class="use-case-img">
          <div class="use-case-description">
-            <h2 id="oil-gas">Oil &amp; Gas</h2>
+            <h2 id="oil-gas">Energy</h2>
             <ul>
-               <li>EMQ <a href="https://www.emqx.com/en/customers/emq-helps-innovation-in-the-oil-iot">helps IoT innovation in the petrochemical industry</a></li>
+               <li>EMQ helps IoT innovation in the <a href="https://www.emqx.com/en/customers/emq-helps-innovation-in-the-oil-iot" target="_blank">petrochemical industry</a></li>
+               <li><a href="https://cirrus-link.com/wp-content/uploads/2022/05/Case-Study-Energy-Company-Maximizing-MQTT-for-Control-and-Efficient-Image-Data-Transfer-Final.pdf" target="_blank">Energy company</a> maximizing MQTT for control</li>
+               <li>MQTT implementation on Celikler Holding's <a href="https://www.bevywise.com/blog/iot-success-stories-mqtt-broker-celikler-holding/" target="_blank">power plant monitoring</a></li>
             </ul>
          </div>
       </article>
@@ -70,7 +69,7 @@ MQTT is used in a large variety of use cases and industries.
          <div class="use-case-description">
             <h2 id="consumer-products">Consumer Products</h2>
             <ul>
-               <li>CASO Design creates <a href="https://www.hivemq.com/case-studies/caso/">Smart Kitchen Appliances</a>.</li>
+               <li>CASO Design creates <a href="https://www.hivemq.com/case-studies/caso/" target="_blank">smart kitchen appliances</a></li>
             </ul>
          </div>
       </article>
@@ -80,7 +79,8 @@ MQTT is used in a large variety of use cases and industries.
          <div class="use-case-description">
          <h2 id="transportation">Transportation</h2>
          <ul>
-            <li>Deploying IoT on Germany's <a href="https://iot.eclipse.org/community/resources/case-studies/iot-on-railway-systems-db/">DB Railway System</a>.</li>
+            <li>Deploying IoT on Germany's <a href="https://iot.eclipse.org/community/resources/case-studies/pdf/Eclipse%20IoT%20Success%20Story%20-%20DB.pdf" target="_blank">DB Railway System</a></li>
+            <li><a href="https://www.hivemq.com/case-studies/air-france-klm/" target="_blank">Air France-KLM Group</a> improves efficiency and passenger experience</li>
          </ul>
       </div>
       </article>