diff --git a/build_web.sh b/build_web.sh
index 1975ab5..3366a17 100755
--- a/build_web.sh
+++ b/build_web.sh
@@ -4,9 +4,7 @@ echo "-- Preparing WWW files --"
 
 [[ -e html ]] && rm -r html
 
-cd front-end
-ESP_PROD=1 sh ./build.sh
-cd ..
+ESP_PROD=1 front-end/build.sh
 
 echo "Copying from submodule..."
 
diff --git a/front-end b/front-end
index 9db61f0..b2174fc 160000
--- a/front-end
+++ b/front-end
@@ -1 +1 @@
-Subproject commit 9db61f0c1a0d3b19e62e3913954b28941faedc03
+Subproject commit b2174fc528d2766eb82d1e828d70bb432d4ea949
diff --git a/showmem.php b/showmem.php
index d142615..0137910 100755
--- a/showmem.php
+++ b/showmem.php
@@ -23,7 +23,7 @@ foreach ($pieces as $piece) {
   }
 }
 
-if ($argv[1]) {
+if (isset($argv[1])) {
   $key = $argv[1];
   uasort($table, function($a, $b) use ($key) {
     $av = $a[$key] ?? 0;