diff --git a/package-lock.json b/package-lock.json
index cc29aab..4a654d0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@ludus/ludus-js-pure",
-  "version": "0.1.20",
+  "version": "0.1.21",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@ludus/ludus-js-pure",
-      "version": "0.1.20",
+      "version": "0.1.21",
       "license": "GPL-3.0",
       "devDependencies": {
         "shadow-cljs": "^2.26.0",
diff --git a/package.json b/package.json
index d0ec62b..bb52125 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ludus/ludus-js-pure",
-  "version": "0.1.20",
+  "version": "0.1.21",
   "description": "A Ludus interpreter in a pure JS function.",
   "type": "module",
   "main": "build/ludus.mjs",