diff --git a/src/Module/Conversation/Channel.php b/src/Module/Conversation/Channel.php
index 108846034c..b8d8ba4ff0 100644
--- a/src/Module/Conversation/Channel.php
+++ b/src/Module/Conversation/Channel.php
@@ -131,8 +131,8 @@ class Channel extends Timeline
 		$pager = new BoundariesPager(
 			$this->l10n,
 			$this->args->getQueryString(),
-			$items[0][$order],
-			$items[count($items) - 1][$order],
+			$items[array_key_first($items)][$order],
+			$items[array_key_last($items)][$order],
 			$this->itemsPerPage
 		);
 
diff --git a/src/Module/Conversation/Network.php b/src/Module/Conversation/Network.php
index 5bcde53783..cf55f3546d 100644
--- a/src/Module/Conversation/Network.php
+++ b/src/Module/Conversation/Network.php
@@ -307,8 +307,8 @@ class Network extends Timeline
 			$pager = new BoundariesPager(
 				$this->l10n,
 				$this->args->getQueryString(),
-				$items[0][$this->order]                 ?? null,
-				$items[count($items) - 1][$this->order] ?? null,
+				$items[array_key_first($items)][$this->order] ?? null,
+				$items[array_key_last($items)][$this->order]  ?? null,
 				$this->itemsPerPage
 			);