diff --git a/_src/nebuchadnezzar/ca.md b/_src/nebuchadnezzar/ca.md
index 90445b1..d846a5c 100644
--- a/_src/nebuchadnezzar/ca.md
+++ b/_src/nebuchadnezzar/ca.md
@@ -18,7 +18,8 @@ Follow these instructions to install the certificate on your computer or phone:
 ### Fedora/Arch Linux (or p11-kit)
 
 ```
-# curl -s www.gf4/ca.crt > /tmp/gf4.crt
+# mkdir -p /usr/local/share/ca-certificates
+# curl -sL https://www.gf4.pw/ca.crt > /usr/local/share/ca-certificates/gf4.crt
 # trust anchor /tmp/gf4.crt
 ```