diff --git a/srcpkgs/capnproto/update b/srcpkgs/capnproto/update
new file mode 100644
index 00000000000..0ea36708f7e
--- /dev/null
+++ b/srcpkgs/capnproto/update
@@ -0,0 +1,2 @@
+site='https://api.github.com/repos/sandstorm-io/capnproto/tags'
+pattern='v\K([\d\.]+)'