diff --git a/install-pingfinder.sh b/install-pingfinder.sh
index d8503c2..143cc56 100644
--- a/install-pingfinder.sh
+++ b/install-pingfinder.sh
@@ -13,7 +13,7 @@ fi
 
 read -p "Enter your pingfinder UUID: " pingfinder_uuid
 
-sed 's/pingfinder_uuid/$pingfinder_uuid/g' etc/systemd/system/pingfinder.service > /etc/systemd/system/pingfinder.service
+sed "s/pingfinder_uuid/$pingfinder_uuid/g" etc/systemd/system/pingfinder.service > /etc/systemd/system/pingfinder.service
 cp etc/systemd/system/pingfinder.timer /etc/systemd/system/pingfinder.timer
 cp usr/local/bin/pingfinder.sh /usr/local/bin/pingfinder.sh
 chmod +x /usr/local/bin/pingfinder.sh