diff --git a/doc/02-Installation.md.d/From-Source.md b/doc/02-Installation.md.d/From-Source.md
index 9e4f6ec..1979ffb 100644
--- a/doc/02-Installation.md.d/From-Source.md
+++ b/doc/02-Installation.md.d/From-Source.md
@@ -9,7 +9,7 @@ Make sure you use `businessprocess` as the module name. The following requiremen
 * PHP (≥7.2)
 * [Icinga Web](https://github.com/Icinga/icingaweb2) (≥2.9)
 * [Icinga DB Web](https://github.com/Icinga/icingadb-web) (≥1.0)
-* [Icinga PHP Library (ipl)](https://github.com/Icinga/icinga-php-library) (≥0.13.0)
+* [Icinga PHP Library (ipl)](https://github.com/Icinga/icinga-php-library) (≥0.15.0)
 * [Icinga PHP Thirdparty](https://github.com/Icinga/icinga-php-thirdparty) (≥0.12.0)
 
 <!-- {% include "02-Installation.md" %} -->
diff --git a/library/Businessprocess/Renderer/TileRenderer/NodeTile.php b/library/Businessprocess/Renderer/TileRenderer/NodeTile.php
index 1f32f54..b58a69d 100644
--- a/library/Businessprocess/Renderer/TileRenderer/NodeTile.php
+++ b/library/Businessprocess/Renderer/TileRenderer/NodeTile.php
@@ -88,16 +88,18 @@ class NodeTile extends BaseHtmlElement
             $link = $this->getMainNodeLink();
             if ($renderer->isBreadcrumb()) {
                 $state = strtolower($node->getStateName());
-                if ($node->isHandled()) {
-                    $state = $state . ' handled';
-                }
-                $link->prepend((new StateBall($state, StateBall::SIZE_MEDIUM))->addAttributes([
-                    'title' => sprintf(
-                        '%s %s',
-                        $state,
-                        DateFormatter::timeSince($node->getLastStateChange())
-                    )
-                ]));
+                $link->prependHtml(
+                    (new StateBall($state, StateBall::SIZE_MEDIUM))
+                        ->setHandled($node->isHandled())
+                        ->addAttributes([
+                            'title' => sprintf(
+                                '%s%s %s',
+                                $state,
+                                $node->isHandled() ? ' (handled)' : '',
+                                DateFormatter::timeSince($node->getLastStateChange())
+                            )
+                        ])
+                );
             }
 
             $this->add($link);
diff --git a/library/Businessprocess/Renderer/TreeRenderer.php b/library/Businessprocess/Renderer/TreeRenderer.php
index 097d148..6fa4c5c 100644
--- a/library/Businessprocess/Renderer/TreeRenderer.php
+++ b/library/Businessprocess/Renderer/TreeRenderer.php
@@ -125,16 +125,16 @@ class TreeRenderer extends Renderer
             $icons[] = $node->getIcon();
         }
         $state = strtolower($node->getStateName($parent !== null ? $parent->getChildState($node) : null));
-        if ($node->isHandled()) {
-            $state = $state . ' handled';
-        }
-        $icons[] = (new StateBall($state, StateBall::SIZE_MEDIUM))->addAttributes([
-            'title' => sprintf(
-                '%s %s',
-                $state,
-                DateFormatter::timeSince($node->getLastStateChange())
-            )
-        ]);
+        $icons[] = (new StateBall($state, StateBall::SIZE_MEDIUM))
+            ->setHandled($node->isHandled())
+            ->addAttributes([
+                'title' => sprintf(
+                    '%s%s %s',
+                    $state,
+                    $node->isHandled() ? ' (handled)' : '',
+                    DateFormatter::timeSince($node->getLastStateChange())
+                )
+            ]);
 
         if ($node->isAcknowledged()) {
             $icons[] = new Icon('check');
diff --git a/module.info b/module.info
index 056c669..07131ea 100644
--- a/module.info
+++ b/module.info
@@ -1,7 +1,7 @@
 Name: Businessprocess
 Version: 2.5.1
 Requires:
-  Libraries: icinga-php-library (>=0.13.0), icinga-php-thirdparty (>=0.12.0)
+  Libraries: icinga-php-library (>=0.15.0), icinga-php-thirdparty (>=0.12.0)
   Modules: monitoring (>=2.9.0), icingadb (>=1.1.0)
 Description: A Business Process viewer and modeler
  Provides a web-based process modeler for Icinga. It integrates as a module