diff --git a/_plugins/alert.rb b/_plugins/alert.rb
new file mode 100644
index 0000000000000000000000000000000000000000..72a968ae29bb114d02165604127dc51762f0a23a
--- /dev/null
+++ b/_plugins/alert.rb
@@ -0,0 +1,24 @@
+module Jekyll
+  module Tags
+    class AlertTag < Liquid::Block
+      def initialize(tag_name, block_options, liquid_options)
+        super
+        @class = block_options.strip
+      end
+
+      def render(context)
+        context.stack do
+          context["class"] = @class
+          @content = super
+        end
+        output = <<~EOS
+            <div class="alert #{@class}">
+              #{@content}
+            </div>
+        EOS
+      end
+    end
+  end
+end
+
+Liquid::Template.register_tag('alert', Jekyll::Tags::AlertTag)
\ No newline at end of file
diff --git a/_plugins/alert_header.rb b/_plugins/alert_header.rb
new file mode 100644
index 0000000000000000000000000000000000000000..2f1617d975e1a9d082aa8d176ff189de8f11784f
--- /dev/null
+++ b/_plugins/alert_header.rb
@@ -0,0 +1,18 @@
+module Jekyll
+  module Tags
+    class AlertHeaderTag < Liquid::Block
+      def initialize(tag_name, block_options, liquid_options)
+        super
+      end
+
+      def render(context)
+        context.stack do
+          @content = super
+        end
+        output = "<h3>#{@content}</h3>"
+      end
+    end
+  end
+end
+
+Liquid::Template.register_tag('alert_header', Jekyll::Tags::AlertHeaderTag)
\ No newline at end of file
diff --git a/_sass/minima/_lcsb.scss b/_sass/minima/_lcsb.scss
index 7ec1390aa196e41b5420fad0b2270b8ba0f4d8c6..f88e74025e9a241b35ae7a418fcb8c347400eb3a 100644
--- a/_sass/minima/_lcsb.scss
+++ b/_sass/minima/_lcsb.scss
@@ -10,6 +10,31 @@
   height: 50px;
 }
 
+div.alert {
+  padding: .75rem 1.25rem;
+  border: 1px solid transparent;
+  border-radius: 3px;
+  margin: 10px;
+  font-weight: 300;
+}
+
+div.alert > h3 {
+  font-weight: 600;
+  margin-bottom: 3px
+}
+
+div.alert.warning {
+  border-color: #feedbb;
+  background-color: #fef5cf;
+  color: #846102;
+}
+
+div.alert.info {
+  border-color: #baeeff;
+  background-color: #c3e5ff;
+  color: #045689;
+}
+
 // Normal (desktop) ========================================================
 .img-uni-lu {
   bottom: -2px;
diff --git a/index.md b/index.md
index 880ce3bfd9b1b101b72fcb53c925504134d3b5d9..d621f6bcf6aa7f713822d2d5380a267848fece0f 100644
--- a/index.md
+++ b/index.md
@@ -14,4 +14,14 @@ The theme is displayed via Gitlab [pages](https://core-services.pages.uni.lu/jek
 Read the [README](https://git-r3lab.uni.lu/core-services/jekyll-theme-lcsb-default/blob/master/README.md) file to know how to use in your project.
 
 
-To start a new page for your repository, you can fork [this project](https://git-r3lab.uni.lu/core-services/pages-jekyll-lcsb-template) and start to modify it directly.
\ No newline at end of file
+To start a new page for your repository, you can fork [this project](https://git-r3lab.uni.lu/core-services/pages-jekyll-lcsb-template) and start to modify it directly.
+
+{% alert info %}
+{% alert_header %}Header{% endalert_header %}
+This is a test info alert
+{% endalert %}
+
+{% alert warning %}
+{% alert_header %}Header{% endalert_header %}
+This is a test warning alert
+{% endalert %}
\ No newline at end of file
diff --git a/jekyll-theme-lcsb-default.gemspec b/jekyll-theme-lcsb-default.gemspec
index 65eef0367a5162e8dde431e3d5b6b154ae50547b..dd127efebdcbb69e8e4a9fec9624faed52a53e03 100644
--- a/jekyll-theme-lcsb-default.gemspec
+++ b/jekyll-theme-lcsb-default.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name          = "jekyll-theme-lcsb-default"
-  spec.version       = "0.2.18"
+  spec.version       = "0.2.19"
   spec.authors       = ["Trefex", "jaceklebioda_lux"]
   spec.email         = ["lcsb-sysadmins@uni.lu"]