diff --git a/Project.toml b/Project.toml
index 9d3dc93..2c4340d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -8,6 +8,12 @@ Expronicon = "6b7a57c9-7cc1-4fdf-b7f5-e857abae3636"
 MLStyle = "d8e11817-5142-5d16-987a-aa16d5891078"
 YaoLocations = "66df03fb-d475-48f7-b449-3d9064bf085b"
 
+[weakdeps]
+OpenQASM = "a8821629-a4c0-4df7-9e00-12969ff383a7"
+
+[extensions]
+YaoHIRExt = ["OpenQASM"]
+
 [compat]
 Expronicon = "0.10"
 MLStyle = "0.4"
@@ -15,7 +21,6 @@ YaoLocations = "0.1"
 julia = "1.9"
 
 [extras]
-OpenQASM = "a8821629-a4c0-4df7-9e00-12969ff383a7"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]