diff --git a/package-lock.json b/package-lock.json
index 7447961..b07dc7a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "tidytree",
-  "version": "0.5.9",
+  "version": "0.7.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -50,12 +50,6 @@
         "@types/node": "*"
       }
     },
-    "acorn": {
-      "version": "7.4.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.4.1.tgz",
-      "integrity": "sha512-nQyp0o1/mNdbTO1PO6kHkwSrmgZ0MT/jCCpNiwbUjGoRN4dlBhqJtoQuCnEOKzgTVwg0ZWiCoQy6SxMebQVh8A==",
-      "dev": true
-    },
     "builtin-modules": {
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-3.2.0.tgz",
@@ -350,6 +344,13 @@
       "integrity": "sha512-1fMXF3YP4pZZVozF8j/ZLfvnR8NSIljt56UhbZ5PeeDmmGHpgpdwQt7ITlGvYaQukCvuBRMLEiKiYC+oeIg4cg==",
       "dev": true
     },
+    "fsevents": {
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
+      "integrity": "sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==",
+      "dev": true,
+      "optional": true
+    },
     "function-bind": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
@@ -426,14 +427,12 @@
       "integrity": "sha512-ndEIpszUHiG4HtDsQLeIuMvRsDnn8c8rYStabochtUeCvfuvNptb5TUbVD68LRAILPX7p9nqQGh4xJgn3EHS/g=="
     },
     "rollup": {
-      "version": "1.32.1",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-1.32.1.tgz",
-      "integrity": "sha512-/2HA0Ec70TvQnXdzynFffkjA6XN+1e2pEv/uKS5Ulca40g2L7KuOE3riasHoNVHOsFD5KKZgDsMk1CP3Tw9s+A==",
+      "version": "2.79.2",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.79.2.tgz",
+      "integrity": "sha512-fS6iqSPZDs3dr/y7Od6y5nha8dW1YnbgtsyotCVvoFGKbERG++CVRFv1meyGDE1SNItQA8BrnCw7ScdAhRJ3XQ==",
       "dev": true,
       "requires": {
-        "@types/estree": "*",
-        "@types/node": "*",
-        "acorn": "^7.1.0"
+        "fsevents": "~2.3.2"
       }
     },
     "rw": {
diff --git a/package.json b/package.json
index f7c0922..d722d23 100644
--- a/package.json
+++ b/package.json
@@ -25,6 +25,6 @@
   },
   "devDependencies": {
     "@rollup/plugin-node-resolve": "^9.0.0",
-    "rollup": "^1.32.1"
+    "rollup": "^2.79.2"
   }
 }