diff --git a/localizefonts.sh b/localizefonts.sh
index 072691bd..45a2c366 100755
--- a/localizefonts.sh
+++ b/localizefonts.sh
@@ -1,7 +1,8 @@
 #!/bin/sh
 
 base='https://fonts\.(gstatic\.com|kavin\.rocks)'
-fonts=$(cat dist/assets/* | grep -Po "$base[^)]*" | sort | uniq)
+fonts=$(cat dist/assets/* | grep -Eo "${base}[^)]*" | sort | uniq)
+
 for font in $fonts; do
 	file="dist/fonts$(echo "$font" | sed -E "s#$base##")"
 	mkdir -p "$(dirname "$file")"