diff --git a/addon/build.sh b/addon/build.sh
index 493c055d..925bc6c3 100755
--- a/addon/build.sh
+++ b/addon/build.sh
@@ -1,2 +1,3 @@
+cp ../target/release-browser/datomish.js release/
 node_modules/.bin/webpack -p
 cat src/wrapper.prefix built/index.js > release/index.js