diff --git a/src/install.sh b/src/install.sh
old mode 100644
new mode 100755
index f4a77da..4123fd7
--- a/src/install.sh
+++ b/src/install.sh
@@ -7,11 +7,12 @@ WEB_DIR="/var/www"
 BIN_TARGET="/usr/local/bin/usb-bind-wrapper.sh"
 SUDOERS_FILE="/etc/sudoers.d/010_www-data-nopasswd"
 HEADER_FILE="/var/www/header.php"
+SCRIPT_TAG='<script src="js/usb-toggle.js" defer></script>'
 
 echo "== Installation du plugin =="
 
-cp -r "$SRC_DIR/js" "$WEB_DIR/js"
-cp "$SRC_DIR/usb-toogle.php" "$WEB_DIR/"
+cp  "$SRC_DIR/js/usb-toggle.js" "$WEB_DIR/js/usb-toggle.js"
+cp "$SRC_DIR/usb-toggle.php" "$WEB_DIR/"
 
 # 2. Installer le script dans /usr/local/bin
 echo "-- Installation du wrapper USB"
@@ -42,22 +43,21 @@ if [ ! -f "$HEADER_FILE" ]; then
     exit 1
 fi
 
-# Vérifier si déjà présent
 if grep -q 'usb-toggle.js' "$HEADER_FILE"; then
     echo "Script déjà présent, on skip"
 else
     TMP_FILE=$(mktemp)
-
+    sudo mv "$HEADER_FILE" "${HEADER_FILE}.origin"
     awk -v script="$SCRIPT_TAG" '
-    {
-        # On injecte juste avant </head>
-        if ($0 ~ /<\/head>/) {
-            print "        " script
-        }
-        print
-    }' "$HEADER_FILE" > "$TMP_FILE"
+    !done && $0 ~ /<\/head>/ {
+        print "       " script
+        done=1
+    }
+    { print }
+    ' "${HEADER_FILE}.origin" > "$TMP_FILE"
+
+    sudo mv "$TMP_FILE" "$HEADER_FILE" && chmod 755 "$HEADER_FILE"
 
-    sudo mv "$TMP_FILE" "$HEADER_FILE"
     echo "Script injecté avec succès"
 fi
 
diff --git a/src/js/usb-toogle.js b/src/js/usb-toggle.js
similarity index 100%
rename from src/js/usb-toogle.js
rename to src/js/usb-toggle.js
diff --git a/src/uninstall.sh b/src/uninstall.sh
old mode 100644
new mode 100755
index 73c530c..941bb2a
--- a/src/uninstall.sh
+++ b/src/uninstall.sh
@@ -10,7 +10,7 @@ BIN_TARGET="/usr/local/bin/usb-bind-wrapper.sh"
 # 1. Supprimer fichiers web
 echo "-- Remove web files"
 
-rm -f "$WEB_DIR/usb-toogle.php"
+rm -f "$WEB_DIR/usb-toggle.php"
 rm -rf "$WEB_DIR/js/usb-toggle.js"
 
 sudo rm -f "$BIN_TARGET"
@@ -19,10 +19,8 @@ echo "-- Cleaning header.php"
 
 if grep -q 'usb-toggle.js' "$HEADER_FILE"; then
     TMP=$(mktemp)
-
     grep -v 'usb-toggle.js' "$HEADER_FILE" > "$TMP"
-
-    sudo mv "$TMP" "$HEADER_FILE"
+    sudo mv "$TMP" "$HEADER_FILE" && chmod 755 "$HEADER_FILE"
     echo "JS reference removed"
 else
     echo "No JS reference found"
diff --git a/src/usb-toogle.php b/src/usb-toggle.php
old mode 100644
new mode 100755
similarity index 100%
rename from src/usb-toogle.php
rename to src/usb-toggle.php