diff --git a/pdf.md b/pdf.md
index 2e0a255..1d08965 100644
--- a/pdf.md
+++ b/pdf.md
@@ -3,3 +3,6 @@
 ### Extract pages
 ```pdftk full-pdf.pdf cat 12-15 output outfile_p12-15.pdf```
 
+### Remove password
+```pdftk input.pdf input_pw <password> output output.pdf```
+