diff --git a/APP_CONFIG.md b/APP_CONFIG.md
index 2f0265d..ab21b7e 100644
--- a/APP_CONFIG.md
+++ b/APP_CONFIG.md
@@ -51,6 +51,31 @@ Add this to `~/Library/LaunchAgents/com.maxgoedjen.Secretive.SecretAgent.plist`
 
 Log out and log in again before launching Cyberduck.
 
+## Mountain Duck
+
+Add this to `~/Library/LaunchAgents/com.maxgoedjen.Secretive.SecretAgent.plist`
+
+```
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>Label</key>
+  <string>link-ssh-auth-sock</string>
+  <key>ProgramArguments</key>
+  <array>
+    <string>/bin/sh</string>
+    <string>-c</string>
+    <string>/bin/ln -sf $HOME/Library/Containers/com.maxgoedjen.Secretive.SecretAgent/Data/socket.ssh $SSH_AUTH_SOCK</string>
+  </array>
+  <key>RunAtLoad</key>
+  <true/>
+</dict>
+</plist>
+```
+
+Log out and log in again before launching Mountain Duck.
+
 ## GitKraken
 
 Add this to `~/Library/LaunchAgents/com.maxgoedjen.Secretive.SecretAgent.plist`