diff --git a/README.md b/README.md
index d3086b0..e66864c 100644
--- a/README.md
+++ b/README.md
@@ -5,13 +5,13 @@ Analyze fail2ban logs to find most common ip's and plot histogram of access rate
 ## Example usage
 Plot the histogram of the access hits
 ```
-zcat /var/log/fail2ban.log* | ./fail2ban-analyze.py histogram
+zcat -f /var/log/fail2ban.log* | ./fail2ban-analyze.py histogram
 ```
 Rank IPs by bans, first 20 results
 ```
-zcat /var/log/fail2ban.log* | ./fail2ban-analyze.py rank 4 --only-bans --count 20
+zcat -f /var/log/fail2ban.log* | ./fail2ban-analyze.py rank 4 --only-bans --count 20
 ```
 Rank all IPs by bans, clobber by first 2 subnets
 ```
-zcat /var/log/fail2ban.log* | ./fail2ban-analyze.py rank 2 --only-bans --count 20
+zcat -f /var/log/fail2ban.log* | ./fail2ban-analyze.py rank 2 --only-bans --count 20
 ```