diff --git a/README.md b/README.md
index 8ca51e0..d4ef3a1 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@ sudo ksigner setup
 
 3. **Optionally, enable automatic kernel signing**:
 ```bash
-sed -i 's/^# *\(AUTO_SIGN=true\)/\1/' /etc/ksigner/ksigner.conf
+sudo sed -i 's/^# *\(AUTO_SIGN=true\)/\1/' /etc/ksigner/ksigner.conf
 ```
 
 4. **Reboot and enroll MOK keys**: