diff --git a/common/pin.go b/common/pin.go
index 6db9d15..d42fb58 100644
--- a/common/pin.go
+++ b/common/pin.go
@@ -8,7 +8,8 @@ import (
 
 // Define the regex pattern as a constant
 const (
-	pinPattern = `^\d{4}$`
+	pinPattern         = `^\d{4}$`
+	AllowedPINAttempts = uint8(3)
 )
 
 // checks whether the given input is a 4 digit number