diff --git a/app/src/main/java/app/fedilab/android/helper/SpannableHelper.java b/app/src/main/java/app/fedilab/android/helper/SpannableHelper.java
index dd977e77..73d99369 100644
--- a/app/src/main/java/app/fedilab/android/helper/SpannableHelper.java
+++ b/app/src/main/java/app/fedilab/android/helper/SpannableHelper.java
@@ -184,8 +184,8 @@ public class SpannableHelper {
             if (matchEnd > content.toString().length()) {
                 matchEnd = content.toString().length();
             }
-            if (content.toString().length() > matchEnd) {
-                matchEnd = content.toString().length();
+            if (content.toString().length() > matchEnd || matchStart < 0) {
+                continue;
             }
             final String url = content.toString().substring(matchStart, matchEnd);
             String newURL = Helper.transformURL(context, url);