diff --git a/package.json b/package.json
index 7faa835..da1d0e9 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "nprogress": "0.2.0",
     "path-to-regexp": "2.4.0",
     "screenfull": "3.3.3",
-    "simple-drawing-board": "^2.0.1",
+    "simple-drawing-board": "1.4.1",
     "vue": "2.5.17",
     "vue-count-to": "1.0.13",
     "vue-router": "^3.1.3",