diff --git a/scripts/ram_percentage.sh b/scripts/ram_percentage.sh
index a982f29..a4b8101 100755
--- a/scripts/ram_percentage.sh
+++ b/scripts/ram_percentage.sh
@@ -9,7 +9,7 @@ ram_percentage_format="%3.1f%%"
 
 sum_macos_vm_stats() {
   cat - \
-  | perl -pe "s/^[^\d]*([\d]*)\./\1/g"  \
+  | grep -o [0-9]* \
   | awk '{ a += $1 * 4096 } END { print a }' 
 }