diff --git a/README.org b/README.org
index debee45..3b842b8 100644
--- a/README.org
+++ b/README.org
@@ -49,6 +49,7 @@
      - SBCL compiler;
      - xdg-open;
      - openssl;
+     - unzip (command line utitlity to decompress zip file);
      - your favourite editor (default: nano).
 
 All  the dependencies  above  should be  available  using the  package
diff --git a/README.txt b/README.txt
index daccd70..e7e1418 100644
--- a/README.txt
+++ b/README.txt
@@ -90,6 +90,7 @@ Table of Contents
     • SBCL compiler;
     • xdg-open;
     • openssl;
+    • unzip (command line utitlity to decompress zip file);
     • your favourite editor (default: nano).
 
   All the dependencies above should be available using the package