diff --git a/extension/content.js b/extension/content.js
index 620ee5d..3dfe67d 100644
--- a/extension/content.js
+++ b/extension/content.js
@@ -1685,13 +1685,15 @@ function extractDeadlineFromPostText(postElement) {
   ];
 
   const extractTimeAfterIndex = (text, index) => {
-    const tail = text.slice(index, index + 40);
-    const timeMatch = /^\s*(?:[,;:-]|\b)?\s*(?:um|ab|bis)?\s*(?:ca\.?)?\s*(\d{1,2})[:.](\d{2})\s*(?:uhr|h)?/i.exec(tail);
+    const tail = text.slice(index, index + 80);
+    const timeMatch = /^\s*(?:[,;:-]|\b)?\s*(?:um|ab|bis|gegen|spätestens)?\s*(?:den|dem|am)?\s*(?:ca\.?)?\s*(\d{1,2})(?:[:.](\d{2}))?\s*(?:uhr|h)?/i.exec(tail);
     if (!timeMatch) {
       return null;
     }
     const hour = parseInt(timeMatch[1], 10);
-    const minute = parseInt(timeMatch[2], 10);
+    const minute = typeof timeMatch[2] === 'string' && timeMatch[2].length
+      ? parseInt(timeMatch[2], 10)
+      : 0;
     if (Number.isNaN(hour) || Number.isNaN(minute)) {
       return null;
     }