diff --git a/library.properties b/library.properties
index 9e9a9e3..234e9c4 100644
--- a/library.properties
+++ b/library.properties
@@ -6,3 +6,4 @@ sentence=Telegraph automatically sends Morse code signals on an Arduino pin.
 paragraph=It also supports manual control of the pin. The speed is configurable, and active-on-LOW relays are supported.
 category=Signal Input/Output
 url=https://git.kj7rrv.com/kj7rrv/Telegraph
+architectures=*