diff --git a/tforgione.sh b/tforgione.sh
index c1e13e3..6a2efcf 100755
--- a/tforgione.sh
+++ b/tforgione.sh
@@ -90,14 +90,24 @@ configure_zsh() {
 
     test_command git
     if [ $? -ne 0 ]; then
-        yes_no_ask_required "you'll need git for this, do you wish to install git ?"
-        install git
+        if [ $sudo_available -ne 0 ]; then
+            error "git is needed, but you don't have git neither sudo"
+            return 1
+        else
+            yes_no_ask_required "you'll need git for this, do you wish to install git ?"
+            install git
+        fi
     fi
 
     test_command zsh
     if [ $? -ne 0 ]; then
-        yes_no_ask_required "this magnificent prompt is based on zsh, do you wish to install zsh ?"
-        install zsh
+        if [ $sudo_available -ne 0 ]; then
+            error "zsh is needed, but you don't have zsh neither sudo"
+            return 1
+        else
+            yes_no_ask_required "this magnificent prompt is based on zsh, do you wish to install zsh ?"
+            install zsh
+        fi
     fi
 
     mkdir -p $HOME/.config
@@ -131,12 +141,24 @@ configure_zsh() {
         info "it seems that you already use zsh."
     else
         info "it seems your shell is not zsh..."
-        yes_no_ask "do you want to change your shell ? (you'll need root) ?"
-        if [ $? -eq 0 ]; then
-            info "changing your shell"
-            sudo chsh $user -s /bin/zsh
+
+        if [ $sudo_available -eq 0 ]; then
+            # Sudo is available, run chsh
+            yes_no_ask "do you want to change your shell ? (you'll need root) ?"
+            if [ $? -eq 0 ]; then
+                info "changing your shell"
+                sudo chsh $user -s /bin/zsh
+            else
+                info "not doing anything"
+            fi
         else
-            info "not doing anything"
+            info "you don't have root, but you can run 'exec zsh' at the end of your bashrc"
+            yes_no_ask "do you wish to do that ?"
+            if [ $? -eq 0 ]; then
+                echo "\nexec zsh\n" >> $HOME/.bashrc
+            else
+                info "not doing anything"
+            fi
         fi
     fi
 }
@@ -146,5 +168,15 @@ main() {
     configure_zsh
 }
 
+sudoresult=$(sudo -nv 2>&1)
+
+if [ $? -eq 0 ]; then
+    sudo_available=0
+elif echo $sudoresult | grep -q '^sudo:'; then
+    sudo_available=0
+else
+    sudo_available=1
+fi
+
 main < /dev/tty