diff --git a/package-lock.json b/package-lock.json
index bbade42..04e89b9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
       "devDependencies": {
         "@ca-ts/algo": "npm:@jsr/ca-ts__algo@^0.4.0",
         "@ca-ts/rle": "npm:@jsr/ca-ts__rle@^0.8.0",
-        "@ca-ts/rule": "npm:@jsr/ca-ts__rule@^0.2.0",
+        "@ca-ts/rule": "npm:@jsr/ca-ts__rule@^0.3.0",
         "babylonjs": "^7.29.0",
         "typescript": "^5.6.3",
         "vite": "^5.4.1"
@@ -34,9 +34,9 @@
     },
     "node_modules/@ca-ts/rule": {
       "name": "@jsr/ca-ts__rule",
-      "version": "0.2.0",
-      "resolved": "https://npm.jsr.io/~/11/@jsr/ca-ts__rule/0.2.0.tgz",
-      "integrity": "sha512-EF4RJx9reZ1KSeDVTegKLEaHsk3rEjAxUSrqHh9acacqdxvHTumhalxNyfYKqFq6DJkZdHxKDniOTICjnQ+lnQ==",
+      "version": "0.3.0",
+      "resolved": "https://npm.jsr.io/~/11/@jsr/ca-ts__rule/0.3.0.tgz",
+      "integrity": "sha512-bK8w2k3P0232vLl/LLtVkoUAxcyCzTDQzroES7/7jqtEn+ZhIi+9F8ym7bKctdTPqY7fFqXUd4mkSbChaRxSxQ==",
       "dev": true
     },
     "node_modules/@esbuild/aix-ppc64": {
diff --git a/package.json b/package.json
index a4f27db..5f0b941 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   "devDependencies": {
     "@ca-ts/algo": "npm:@jsr/ca-ts__algo@^0.4.0",
     "@ca-ts/rle": "npm:@jsr/ca-ts__rle@^0.8.0",
-    "@ca-ts/rule": "npm:@jsr/ca-ts__rule@^0.2.0",
+    "@ca-ts/rule": "npm:@jsr/ca-ts__rule@^0.3.0",
     "babylonjs": "^7.29.0",
     "typescript": "^5.6.3",
     "vite": "^5.4.1"
diff --git a/src/lib/setRLE.ts b/src/lib/setRLE.ts
index 767ea4d..9451453 100644
--- a/src/lib/setRLE.ts
+++ b/src/lib/setRLE.ts
@@ -6,7 +6,12 @@ export function setRLE(bitWorld: BitWorld, sourceRLE: string) {
   const data = parseRLE(sourceRLE);
 
   try {
-    bitWorld.setRule(parseRule(data.ruleString).transition);
+    const rule = parseRule(data.ruleString);
+    if (rule.type === "outer-totalistic") {
+      bitWorld.setRule(rule.transition);
+    } else {
+      throw new Error("unsupported rule");
+    }
   } catch {
     bitWorld.setRule({ birth: [3], survive: [2, 3] });
   }