document openssl dependency

index.html

@@ -64,6 +64,7 @@
 						If you received a message from someone that was encrypted with this script, you can decrypt it with your ssh private key using the following command without installing anything:<br>
 						<code>bash <(curl -s https://sshenc.sh/sshenc.sh) -s ~/.ssh/id_rsa < file-containing-the-encrypted-text.txt</code>
 					</div>
+					<p>sshenc.sh uses openssl under the hood, so you need to have that installed in yout path to make it work.</p>
 				</div>
 			</div>