diff --git a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt
index d28e0a4f..e2f2a502 100644
--- a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt
@@ -70,7 +70,7 @@ fun Context.getMessages(threadId: Int? = null): ArrayList<Message> {
         messages = messages.distinctBy { it.thread }.toMutableList() as ArrayList<Message>
     }
 
-    messages = messages.filter { !isNumberBlocked(it.participants.first().phoneNumber) }.toMutableList() as ArrayList<Message>
+    messages = messages.filter { !isNumberBlocked(it.participants.firstOrNull()?.phoneNumber ?: "") }.toMutableList() as ArrayList<Message>
     return messages
 }