diff --git a/package.json b/package.json
index 4fec3c264..9d836ab8d 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
   "dependencies": {
     "@types/backbone": "1.4.15",
     "backbone": "1.4.1",
-    "backbone-undo": "0.2.5",
+    "backbone-undo": "0.2.6",
     "codemirror": "5.63.0",
     "codemirror-formatting": "1.0.0",
     "promise-polyfill": "8.1.3",
diff --git a/yarn.lock b/yarn.lock
index 05a385278..54756e9a0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3295,15 +3295,15 @@ babelify@^10.0.0:
   resolved "https://registry.npmjs.org/babelify/-/babelify-10.0.0.tgz#fe73b1a22583f06680d8d072e25a1e0d1d1d7fb5"
   integrity sha512-X40FaxyH7t3X+JFAKvb1H9wooWKLRCi8pg3m8poqtdZaIng+bjzp9RvKQCvRjF9isHiPkXspbbXT/zwXLtwgwg==
 
-backbone-undo@0.2.5:
-  version "0.2.5"
-  resolved "https://registry.npmjs.org/backbone-undo/-/backbone-undo-0.2.5.tgz#55b25230f90319ca622465e89a80248b893c2ce2"
-  integrity sha512-fmIFggCqDpQKWj2YlxjipGlKqEKjIrCoee4BnHJoLNflSy4/Rd9T7DVsELJ50CrQctOscdFfB7cGnqncluIthQ==
+backbone-undo@0.2.6:
+  version "0.2.6"
+  resolved "https://registry.npmjs.org/backbone-undo/-/backbone-undo-0.2.6.tgz#00c4d78ab2425c18a76f2a96a1eee181560a5d8d"
+  integrity sha512-AsfpNiljLXlk7TcffDUu3EAUq7CxWbyTNwARWrql5XTzN4vh6WzEEBZYaKK4kTTz+iW1tSzqUooaGRIwO83kWA==
   dependencies:
-    backbone "1.0.0 - 1.2.1"
-    underscore "1.4.4 - 1.8.3"
+    backbone ">=1.0.0"
+    underscore ">=1.4.4"
 
-"backbone@1.0.0 - 1.2.1", backbone@1.3.3:
+backbone@1.3.3, backbone@>=1.0.0:
   version "1.3.3"
   resolved "https://registry.npmjs.org/backbone/-/backbone-1.3.3.tgz#4cc80ea7cb1631ac474889ce40f2f8bc683b2999"
   integrity sha512-aK+k3TiU4tQDUrRCymDDE7XDFnMVuyE6zbZ4JX7mb4pJbQTVOH997/kyBzb8wB2s5Y/Oh7EUfj+sZhwRPxWwow==
@@ -13508,7 +13508,7 @@ unc-path-regex@^0.1.2:
   resolved "https://registry.npmjs.org/unc-path-regex/-/unc-path-regex-0.1.2.tgz#e73dd3d7b0d7c5ed86fbac6b0ae7d8c6a69d50fa"
   integrity sha512-eXL4nmJT7oCpkZsHZUOJo8hcX3GbsiDOa0Qu9F646fi8dT3XuSVopVqAcEiVzSKKH7UoDti23wNX3qGFxcW5Qg==
 
-underscore@1.13.1, "underscore@1.4.4 - 1.8.3":
+underscore@1.13.1, underscore@>=1.4.4:
   version "1.13.1"
   resolved "https://registry.npmjs.org/underscore/-/underscore-1.13.1.tgz#0c1c6bd2df54b6b69f2314066d65b6cde6fcf9d1"
   integrity sha512-hzSoAVtJF+3ZtiFX0VgfFPHEDRm7Y/QPjGyNo4TVdnDTdft3tr8hEkD25a1jC+TjTuE7tkHGKkhwCgs9dgBB2g==