diff --git a/templates/libraries/category_list.html b/templates/libraries/category_list.html
index 1776f02f..0e17ba53 100644
--- a/templates/libraries/category_list.html
+++ b/templates/libraries/category_list.html
@@ -77,6 +77,9 @@
     </form>
   </div>
 
+  <!-- alert for non-current Boost versions -->
+  {% include "libraries/includes/version_alert.html" %}
+
   <!-- Libraries list -->
   <div class="space-y-3">
     {% if by_category %}
diff --git a/templates/libraries/flat_list.html b/templates/libraries/flat_list.html
index 586e412b..cb797f28 100644
--- a/templates/libraries/flat_list.html
+++ b/templates/libraries/flat_list.html
@@ -77,6 +77,9 @@
     </form>
   </div>
 
+  <!-- alert for non-current Boost versions -->
+  {% include "libraries/includes/version_alert.html" %}
+
   <!-- Libraries list -->
   <div class="relative content-between p-3 w-full bg-white rounded-lg shadow-lg md:p-5 dark:bg-charcoal">
     {% if by_category %}
diff --git a/templates/libraries/includes/version_alert.html b/templates/libraries/includes/version_alert.html
new file mode 100644
index 00000000..35d07b4c
--- /dev/null
+++ b/templates/libraries/includes/version_alert.html
@@ -0,0 +1,5 @@
+{% if version_alert %}
+    <div role="alert">
+        <p>This is an older version and was released in {{ version.release_date|date:"Y"}}. The current version is <a href="{% url 'version-detail' latest_version.slug %}">{{ latest_version.display_name }}</a>.</p>
+    </div>
+{% endif %}
diff --git a/templates/libraries/list.html b/templates/libraries/list.html
index f17f6f2e..04d95848 100644
--- a/templates/libraries/list.html
+++ b/templates/libraries/list.html
@@ -77,6 +77,9 @@
     </form>
   </div>
 
+  <!-- alert for non-current Boost versions -->
+  {% include "libraries/includes/version_alert.html" %}
+
   <!-- Libraries list -->
   <div class="grid grid-cols-1 gap-4 mb-5 md:grid-cols-2 xl:grid-cols-3">
     {% if by_category %}