diff --git a/tinmop.asd b/tinmop.asd
index 1ed9e3a..5f2a02f 100644
--- a/tinmop.asd
+++ b/tinmop.asd
@@ -18,7 +18,7 @@
 (defsystem :tinmop
   :author      "cage"
   :license     "GPLv3+"
-  :version     "0.9.9.141421356237"
+  :version     "0.9.9.141421356237-rc1"
   :pathname    "src"
   :serial      t
   :bug-tracker "https://codeberg.org/cage/tinmop/issues"