diff --git a/commands/decrypt-group/decryptCommands.cs b/commands/decrypt-group/decryptCommands.cs
index 6c6798d1..4fc0faa2 100644
--- a/commands/decrypt-group/decryptCommands.cs
+++ b/commands/decrypt-group/decryptCommands.cs
@@ -46,7 +46,7 @@ public async Task Morse([Summary("message", "the text you want to decrypt")] str
         {
             await DeferAsync(ephemeral: true);
 
-            if (key.Any(char.IsLetter) == false)
+            if (key.All(char.IsLetter) == false)
             {
                 await FollowupAsync(text: "❌ The message *cannot* be encrypted because the key contains non-alphabetic characters.", ephemeral: true);
             }