diff --git a/README.md b/README.md
index aaebb0d..045f650 100644
--- a/README.md
+++ b/README.md
@@ -11,3 +11,19 @@ services:
     ports:
       - "8282:80"
 ```
+
+You can customize your Phanpy instance by adding an `args` section to the Docker Compose file and reubilding the image:
+
+```yaml
+services:
+  phanpy:
+    build:
+      ...
+      args:
+        PHANPY_CLIENT_NAME: "Phanpy"
+        PHANPY_WEBSITE: "https://phanpy.social"
+        PHANPY_DEFAULT_INSTANCE: "https://mastodon.social"
+```
+
+You can find a full list on the official Phanpy repo.
+