diff --git a/README.md b/README.md
index b24fea1..75e336c 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Instructions 
 
 ## docker-compose 
+- if you run into problems. delete stale containers and: `docker image prune` and `docker volume prune` to make sure there are no stale images and volumes.
 - copy `config.env.exmaple` to `config.env` and edit 
 - optional: if you intend to link, copy `include.default.conf` to `include.conf` and edit
 - build: `docker-compose -f docker-compose.yml build` use: `docker-compose.linked.yml` if you intend to link.
@@ -14,6 +15,8 @@
 - ~~`docker run -it --rm -e 'DEFAULT_BLOCK_HOST_MASK="nothing"' -net host -v $(pwd)/links.conf:/etc/inspircd/links.conf:ro inspi4`~~
 
 # Linking 
+- Run `docker exec -it irc_ircd_linked_1 openssl x509 -fingerprint -in /etc/ssl/inspircd/server.crt` to get the fingerprints
+
 - On `hub.netcrave.network` add something like this to the `include.conf`:
 
 ```
@@ -24,6 +27,7 @@
       bind="*"
       hidden="no"
       sslprofile="defaultssl"
+      fingerprint="64:00:B8:EB:82:79:68:49:27:FF:9F:C1:94:91:58:E3:DA:19:05:87"
       ipaddr="*"
       name="leaf.netcrave.network"
       port="&env.SERVER_SSL_PORT;"
@@ -42,6 +46,7 @@
       bind="*"
       hidden="no"
       sslprofile="defaultssl"
+      fingerprint="78:50:91:AD:3E:85:19:49:1C:F9:FF:72:94:86:97:28:BE:8B:00:46""
       ipaddr="*"
       name="hub.netcrave.network"
       port="&env.SERVER_SSL_PORT;"