diff --git a/package.json b/package.json
index d2a02af..4acedb8 100644
--- a/package.json
+++ b/package.json
@@ -26,6 +26,7 @@
     "@rollup/plugin-node-resolve": "15.0",
     "@syndicate-lang/ts-plugin": "*",
     "@syndicate-lang/tsc": "*",
+    "esm": "^3.2.25",
     "rollup": "3.8",
     "rollup-plugin-sourcemaps": "0.6",
     "tslib": "2.4",
diff --git a/yarn.lock b/yarn.lock
index be78470..bb74fa9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -278,6 +278,11 @@ escalade@^3.1.1:
   resolved "https://registry.yarnpkg.com/escalade/-/escalade-3.1.1.tgz#d8cfdc7000965c5a0174b4a82eaa5c0552742e40"
   integrity sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw==
 
+esm@^3.2.25:
+  version "3.2.25"
+  resolved "https://registry.yarnpkg.com/esm/-/esm-3.2.25.tgz#342c18c29d56157688ba5ce31f8431fbb795cc10"
+  integrity sha512-U1suiZ2oDVWv4zPO56S0NcR5QriEahGtdN2OR6FiOG4WJvcjBVFB0qI4+eKoWFH483PKGuLuu6V8Z4T5g63UVA==
+
 estree-walker@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/estree-walker/-/estree-walker-1.0.1.tgz#31bc5d612c96b704106b477e6dd5d8aa138cb700"