diff --git a/main.go b/main.go
index fe434a8..c2a77a8 100644
--- a/main.go
+++ b/main.go
@@ -122,7 +122,7 @@ func main() {
 
 	var vig = &cobra.Command{
 		Use:   "vig",
-		Short: "vignenere cipher",
+		Short: "vigenere cipher",
 		Long:  `perform vigenere cipher`,
 		Run: func(cmd *cobra.Command, args []string) {
 			if len(args) < 1 || key == "" {
diff --git a/psyfer/aes.go b/psyfer/aes.go
index 9f452e1..b885748 100644
--- a/psyfer/aes.go
+++ b/psyfer/aes.go
@@ -118,7 +118,12 @@ func BlockGen(arg string) []Block {
 	all := []Block{}
 	b := Block{}
 	for i, char := range arg {
-		value, err := strconv.Atoi(hex.EncodeToString([]byte(string(char))))
+		value, err := strconv.ParseUint(
+			hex.EncodeToString(
+				[]byte(string(char))),
+			16,
+			32,
+		)
 		if err != nil {
 			log.Fatal(err)
 		}