diff --git a/README.md b/README.md
index 488122e..4e01c7e 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,10 @@ similar:
 - matching on mime (magic bytes) instead of filename
 - allow per-adapter configuration options
 
+# Setup
+
+Some rga adapters run external binaries
+
 # Development
 
 To enable debug logging: