diff --git a/srcpkgs/slimerjs/update b/srcpkgs/slimerjs/update
new file mode 100644
index 00000000000..ed21691d137
--- /dev/null
+++ b/srcpkgs/slimerjs/update
@@ -0,0 +1 @@
+pattern="RELEASE_\K[\d.]+(?=\.tar)"