diff --git a/rtlwifi-setup.sh b/rtlwifi-setup.sh
index 5007149..66685e5 100755
--- a/rtlwifi-setup.sh
+++ b/rtlwifi-setup.sh
@@ -19,24 +19,24 @@ _fetch_deps(){
 
 
 _download(){
-    if [ ! -d ${tmpdir}/${pkgname} ];then
-         git clone ${pkgurl} ${tmpdir}/${pkgname}
+    if [ ! -d "${tmpdir}"/"${pkgname}" ];then
+         git clone "${pkgurl}" "${tmpdir}"/"${pkgname}"
     fi
 }
 
 _apply_patch(){
-	wget https://github.com/cilynx/rtl88x2bu/pull/58.patch
+	wget "https://github.com/cilynx/rtl88x2bu/pull/58.patch"
 	git apply 58.patch
 }
 
 _install(){
-    cd ${tmpdir}/${pkgname}
+    cd "${tmpdir}"/"${pkgname}" 
     _apply_patch
     VER=$(sed -n 's/\PACKAGE_VERSION="\(.*\)"/\1/p' dkms.conf)
-    rsync -rvhP ./ /usr/src/rtl88x2bu-${VER}
-    dkms add -m rtl88x2bu -v ${VER}
-    dkms build -m rtl88x2bu -v ${VER}
-    dkms install -m rtl88x2bu -v ${VER}
+    rsync -rvhP ./ /usr/src/rtl88x2bu-"${VER}"
+    dkms add -m rtl88x2bu -v "${VER}"
+    dkms build -m rtl88x2bu -v "${VER}"
+    dkms install -m rtl88x2bu -v "${VER}"
     modprobe 88x2bu
 }