diff --git a/install.sh b/install.sh
index d3f5496..c678b11 100755
--- a/install.sh
+++ b/install.sh
@@ -112,9 +112,19 @@ install() {
     cp -an /etc/default/grub /etc/default/grub.bak
 
     grep "GRUB_THEME=" /etc/default/grub 2>&1 >/dev/null && sed -i '/GRUB_THEME=/d' /etc/default/grub
+    grep "GRUB_GFXMODE=" /etc/default/grub 2>&1 >/dev/null && sed -i '/GRUB_GFXMODE=/d' /etc/default/grub
 
     # Edit grub config
     echo "GRUB_THEME=\"${THEME_DIR}/${name}/theme.txt\"" >> /etc/default/grub
+    
+    # Make sure set the right resolution for grub
+    if [[ ${screen} == '4k' ]]; then
+      echo "GRUB_GFXMODE=3840x2160x32" >> /etc/default/grub
+      echo "GRUB_GFXPAYLOAD_LINUX=text" >> /etc/default/grub
+    elif [[ ${screen} == '2k' ]]; then
+      echo "GRUB_GFXMODE=2560×1440x32" >> /etc/default/grub
+      echo "GRUB_GFXPAYLOAD_LINUX=text" >> /etc/default/grub
+    fi
 
     # Update grub config
     prompt -i "\n Updating grub config..."