diff --git a/package.json b/package.json
index 70015d4..2f8d30c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wkit",
-  "version": "1.11.3",
+  "version": "1.11.4",
   "type": "module",
   "description": "A library for building fast, lightweight web components.",
   "main": "dist/index.js",
diff --git a/src/constants.js b/src/constants.js
index 0ea5289..3dcafc4 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -83,16 +83,14 @@ function getType(v) {
       let type = String
       let attribute = true
       if (v.includes('!')) {
-        v = v.split('!')
-        let _t = v.shift()
-        if (_t === 'str') {
-          v = v.join('!')
-        } else if (_t === 'num') {
+        if (v.startsWith('str!')) {
+          v = v.slice(4)
+        } else if (v.startsWith('num!')) {
           type = Number
-          v = +v.shift() || 0
-        } else if (_t === 'bool') {
+          v = +v.slice(4) || 0
+        } else if (v.startsWith('bool!')) {
           type = Boolean
-          v = v.shift()
+          v = v.slice(5)
           v = v !== 'false' && v !== ''
         }
         attribute = false