diff --git a/talon/signature/bruteforce.py b/talon/signature/bruteforce.py
index e502bab8..ec7eba15 100644
--- a/talon/signature/bruteforce.py
+++ b/talon/signature/bruteforce.py
@@ -16,11 +16,11 @@
                    (?:
                        ^[\s]*--*[\s]*[a-z \.]*$
                        |
-                       ^thanks[\s,!]*$
+                       ^thanks[ a-z]*[\s,!]*$
                        |
-                       ^regards[\s,!]*$
+                       ^regards[ a-z]*[\s,!]*$
                        |
-                       ^cheers[\s,!]*$
+                       ^cheers[ a-z]*[\s,!]*$
                        |
                        ^best[ a-z]*[\s,!]*$
                    )