diff --git a/user-scripts/copier b/user-scripts/copier
index a99b88b..2aec820 100755
--- a/user-scripts/copier
+++ b/user-scripts/copier
@@ -2,7 +2,7 @@
 
 # Description: Copy selection to clipboard
 #
-# Shell: generic
+# Shell: POSIX compliant
 # Author: Arun Prakash Jana
 
 # Linux
diff --git a/user-scripts/edit b/user-scripts/edit
index f23d7a8..d15b34e 100755
--- a/user-scripts/edit
+++ b/user-scripts/edit
@@ -2,11 +2,7 @@
 
 # Description: Fuzzy find a file in directory subtree with fzy and edit in vim
 #
-# Shell: generic
+# Shell: POSIX compliant
 # Author: Arun Prakash Jana
 
-# bash, zsh
-vim $(find -type f | fzy)
-
-# fish
-# vim (find -type f | fzy)
+vim `find -type f | fzy`
diff --git a/user-scripts/fzy b/user-scripts/fzy
index ba8cfc9..0e52b28 100755
--- a/user-scripts/fzy
+++ b/user-scripts/fzy
@@ -2,11 +2,7 @@
 
 # Description: Fuzzy find a file in directory subtree with fzy and open using xdg-open
 #
-# Shell: generic
+# Shell: POSIX compliant
 # Author: Arun Prakash Jana
 
-# bash, zsh
-xdg-open $(find -type f | fzy) >/dev/null 2>&1
-
-# fish
-# xdg-open (find -type f | fzy) >/dev/null 2>&1
+xdg-open `find -type f | fzy` >/dev/null 2>&1
diff --git a/user-scripts/kdeconnect b/user-scripts/kdeconnect
index ac247f4..db28e7a 100755
--- a/user-scripts/kdeconnect
+++ b/user-scripts/kdeconnect
@@ -2,7 +2,7 @@
 
 # Description: Send the selected files to your Android device using kdeconnect-cli. You must have installed and configured kdeconnect both on the Android device and on the PC.
 #
-# Shell: Bash
+# Shell: bash
 # Author: juacq97
 
 id=$(kdeconnect-cli -a --id-only | awk '{print $1}')
diff --git a/user-scripts/picker b/user-scripts/picker
index cebecb1..a500435 100755
--- a/user-scripts/picker
+++ b/user-scripts/picker
@@ -2,7 +2,7 @@
 
 # Description: Pick files and pipe the newline-separated list to another utility
 #
-# Shell: generic
+# Shell: POSIX compliant
 # Author: Arun Prakash Jana
 #
 # Usage:
diff --git a/user-scripts/upgrade b/user-scripts/upgrade
index fa044ee..858a6a0 100755
--- a/user-scripts/upgrade
+++ b/user-scripts/upgrade
@@ -18,7 +18,7 @@ fi
 wget "https://github.com/jarun/nnn/releases/download/v$new/nnn_$new-1_debian9.amd64.deb"
 
 # install it
-dpkg -i nnn_$new-1_debian9.amd64.deb
+sudo dpkg -i nnn_$new-1_debian9.amd64.deb
 
 # remove the file
 rm -rf nnn_$new-1_debian9.amd64.deb