diff --git a/web/package.json b/web/package.json
index 9279d3b2..1315a3b5 100644
--- a/web/package.json
+++ b/web/package.json
@@ -12,7 +12,6 @@
     "@toast-ui/editor": "^3.1.5",
     "core-js": "^3.6.5",
     "element-ui": "^2.15.1",
-    "simple-mind-map": "^0.2.3",
     "vue": "^2.6.11",
     "vue-router": "^3.5.1",
     "vuex": "^3.6.2"