diff --git a/index.html b/index.html
index 2cac9f2..b153c53 100644
--- a/index.html
+++ b/index.html
@@ -84,10 +84,10 @@ printf "      \e[0;36m/  .-.  \ \n\e[0m"
 printf "     \e[0;36m/  (   ) _\ \n\e[0m" 
 printf "    \e[0;36m/ _.~   ~._^\ \n\e[0m"
 printf "   \e[0;36m/.^         ^.\ \n\e[0m"
-if [[ -n $(gpg --version | grep Cipher)  ]];then
+if [ -n "$(gpg --version | grep Cipher)" ];then
   echo "do you want to import my gpg keys? (Y/n)"
   read yn
-  if [[ $yn == y ]] || [[ $yn == yes ]] || [[ -z $yn ]];then
+  if [ "$yn" = y ] || [ "$yn" = yes ] || [ -z "$yn" ];then
     gpg --recv-keys 0x396A62D7D436749E
     gpg --recv-keys 0x49F924B3CEE307B2
     echo "keys have been imported"