diff --git a/build/after-install-openrc.sh b/build/after-install-openrc.sh
index c0e01cd03..8c3e9a638 100755
--- a/build/after-install-openrc.sh
+++ b/build/after-install-openrc.sh
@@ -2,7 +2,7 @@
 rc-update add vikunja default
 
 # Fix the config to contain proper values
-NEW_SECRET=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)
+NEW_SECRET=$(head -c 512 /dev/urandom | tr -dc 'a-zA-Z0-9' | head -c 32)
 sed -i "s/<jwt-secret>/$NEW_SECRET/g" /etc/vikunja/config.yml
 sed -i "s/<rootpath>/\/opt\/vikunja\//g" /etc/vikunja/config.yml
 sed -i "s/path: \"\.\/vikunja.db\"/path: \"\\/opt\/vikunja\/vikunja.db\"/g" /etc/vikunja/config.yml
diff --git a/build/after-install.sh b/build/after-install.sh
index a8f2840d7..1b6399a49 100644
--- a/build/after-install.sh
+++ b/build/after-install.sh
@@ -3,7 +3,7 @@
 systemctl enable vikunja.service
 
 # Fix the config to contain proper values
-NEW_SECRET=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)
+NEW_SECRET=$(head -c 512 /dev/urandom | tr -dc 'a-zA-Z0-9' | head -c 32)
 sed -i "s/<jwt-secret>/$NEW_SECRET/g" /etc/vikunja/config.yml
 sed -i "s/<rootpath>/\/opt\/vikunja\//g" /etc/vikunja/config.yml
 sed -i "s/path: \"\.\/vikunja.db\"/path: \"\\/opt\/vikunja\/vikunja.db\"/g" /etc/vikunja/config.yml