diff --git a/README.md b/README.md
index 7c044c1..bcb0b5e 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,9 @@
 A small, dependency-free Forgejo Action that synchronizes a completed static
 website build to a dedicated Bunny Storage Zone.
 
+The runner needs Bash and Python 3.11 or newer. The action itself installs no
+packages and executes no code from the Gandalf repository.
+
 The deployer requires `index.html`, rejects symbolic links, compares files with
 a checksum manifest, uploads changed assets before HTML, deletes stale files
 only after successful uploads, and publishes the new manifest last.