diff --git a/lerna.json b/lerna.json
index 9de711b..c6af062 100644
--- a/lerna.json
+++ b/lerna.json
@@ -7,5 +7,5 @@
     "packages/core",
     "packages/idraw"
   ],
-  "version": "0.2.0-alpha.18"
+  "version": "0.2.0-alpha.19"
 }
diff --git a/packages/board/package.json b/packages/board/package.json
index d221cd7..18b46e9 100644
--- a/packages/board/package.json
+++ b/packages/board/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@idraw/board",
-  "version": "0.2.0-alpha.18",
+  "version": "0.2.0-alpha.19",
   "description": "",
   "main": "dist/index.cjs.js",
   "module": "dist/index.es.js",
@@ -23,13 +23,13 @@
   "author": "chenshenhai",
   "license": "MIT",
   "devDependencies": {
-    "@idraw/types": "^0.2.0-alpha.18"
+    "@idraw/types": "^0.2.0-alpha.19"
   },
   "dependencies": {
-    "@idraw/util": "^0.2.0-alpha.18"
+    "@idraw/util": "^0.2.0-alpha.19"
   },
   "publishConfig": {
     "access": "public"
   },
-  "gitHead": "be7f4aec953e25aed3fc0d1f61ef9f99407b77f8"
+  "gitHead": "e2a434f40e0e7404bf3f1de612dfb3735b9ffc05"
 }
diff --git a/packages/core/package.json b/packages/core/package.json
index a816efb..4789581 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@idraw/core",
-  "version": "0.2.0-alpha.18",
+  "version": "0.2.0-alpha.19",
   "description": "",
   "main": "dist/index.cjs.js",
   "module": "dist/index.es.js",
@@ -23,14 +23,14 @@
   "author": "chenshenhai",
   "license": "MIT",
   "devDependencies": {
-    "@idraw/types": "^0.2.0-alpha.18"
+    "@idraw/types": "^0.2.0-alpha.19"
   },
   "dependencies": {
-    "@idraw/board": "^0.2.0-alpha.18",
-    "@idraw/util": "^0.2.0-alpha.18"
+    "@idraw/board": "^0.2.0-alpha.19",
+    "@idraw/util": "^0.2.0-alpha.19"
   },
   "publishConfig": {
     "access": "public"
   },
-  "gitHead": "be7f4aec953e25aed3fc0d1f61ef9f99407b77f8"
+  "gitHead": "e2a434f40e0e7404bf3f1de612dfb3735b9ffc05"
 }
diff --git a/packages/idraw/package.json b/packages/idraw/package.json
index 9e276a8..43a4d88 100644
--- a/packages/idraw/package.json
+++ b/packages/idraw/package.json
@@ -1,6 +1,6 @@
 {
   "name": "idraw",
-  "version": "0.2.0-alpha.18",
+  "version": "0.2.0-alpha.19",
   "description": "",
   "main": "dist/index.cjs.js",
   "module": "dist/index.es.js",
@@ -23,14 +23,14 @@
   "author": "chenshenhai",
   "license": "MIT",
   "devDependencies": {
-    "@idraw/types": "^0.2.0-alpha.18"
+    "@idraw/types": "^0.2.0-alpha.19"
   },
   "dependencies": {
-    "@idraw/core": "^0.2.0-alpha.18",
-    "@idraw/util": "^0.2.0-alpha.18"
+    "@idraw/core": "^0.2.0-alpha.19",
+    "@idraw/util": "^0.2.0-alpha.19"
   },
   "publishConfig": {
     "access": "public"
   },
-  "gitHead": "be7f4aec953e25aed3fc0d1f61ef9f99407b77f8"
+  "gitHead": "e2a434f40e0e7404bf3f1de612dfb3735b9ffc05"
 }
diff --git a/packages/renderer/package.json b/packages/renderer/package.json
index c612459..dbebfc9 100644
--- a/packages/renderer/package.json
+++ b/packages/renderer/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@idraw/renderer",
-  "version": "0.2.0-alpha.18",
+  "version": "0.2.0-alpha.19",
   "description": "",
   "main": "dist/index.cjs.js",
   "module": "dist/index.es.js",
@@ -23,13 +23,13 @@
   "author": "chenshenhai",
   "license": "MIT",
   "devDependencies": {
-    "@idraw/types": "^0.2.0-alpha.18"
+    "@idraw/types": "^0.2.0-alpha.19"
   },
   "dependencies": {
-    "@idraw/util": "^0.2.0-alpha.18"
+    "@idraw/util": "^0.2.0-alpha.19"
   },
   "publishConfig": {
     "access": "public"
   },
-  "gitHead": "be7f4aec953e25aed3fc0d1f61ef9f99407b77f8"
+  "gitHead": "e2a434f40e0e7404bf3f1de612dfb3735b9ffc05"
 }
diff --git a/packages/types/package.json b/packages/types/package.json
index 9175ac8..31c5fc0 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@idraw/types",
-  "version": "0.2.0-alpha.18",
+  "version": "0.2.0-alpha.19",
   "description": "",
   "main": "src/index.ts",
   "types": "src/index.ts",
@@ -22,5 +22,5 @@
   "publishConfig": {
     "access": "public"
   },
-  "gitHead": "be7f4aec953e25aed3fc0d1f61ef9f99407b77f8"
+  "gitHead": "e2a434f40e0e7404bf3f1de612dfb3735b9ffc05"
 }
diff --git a/packages/util/package.json b/packages/util/package.json
index 73a68e7..631fc4c 100644
--- a/packages/util/package.json
+++ b/packages/util/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@idraw/util",
-  "version": "0.2.0-alpha.18",
+  "version": "0.2.0-alpha.19",
   "description": "",
   "main": "dist/index.cjs.js",
   "module": "dist/index.es.js",
@@ -23,10 +23,10 @@
   "author": "chenshenhai",
   "license": "MIT",
   "devDependencies": {
-    "@idraw/types": "^0.2.0-alpha.18"
+    "@idraw/types": "^0.2.0-alpha.19"
   },
   "publishConfig": {
     "access": "public"
   },
-  "gitHead": "be7f4aec953e25aed3fc0d1f61ef9f99407b77f8"
+  "gitHead": "e2a434f40e0e7404bf3f1de612dfb3735b9ffc05"
 }