diff --git a/core/structs.ipynb b/core/structs.ipynb
index 09a1676..59820b4 100644
--- a/core/structs.ipynb
+++ b/core/structs.ipynb
@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:a19ef4e563c399be8f5e56aff348924149bc045dc0b070bd846325354013e9ed"
+  "signature": "sha256:6d8f33055bf348eb4c2871340e68a3f7577e0a027f5c83423e35757e01e8243a"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -21,7 +21,8 @@
      "source": [
       "* tuple\n",
       "* list\n",
-      "* dict"
+      "* dict\n",
+      "* set"
      ]
     },
     {