diff --git a/LICENSE.markdown b/LICENSE.markdown
index 20f63bed..91a40aab 100644
--- a/LICENSE.markdown
+++ b/LICENSE.markdown
@@ -60,6 +60,8 @@
   - (c) Matt DesLauriers / MIT License
 - jszip
   - (c) Stuart Knightley, David Duponchel, Franz Buchinger, António Afonso / MIT License
+- Mitt
+  - (c) Jason Miller / MIT License
 - Rollbar
   - (c) Rollbar / MIT License
 - Vue.js
diff --git a/package-lock.json b/package-lock.json
index 4427f2b5..54e7066b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,7 @@
         "filenamify": "^6.0.0",
         "gifenc": "mattdesl/gifenc#64842fca317b112a8590f8fef2bf3825da8f6fe3",
         "jszip": "^3.7.1",
+        "mitt": "^3.0.1",
         "rollbar": "^2.24.0",
         "vue": "^3.1.5"
       },
@@ -19241,6 +19242,11 @@
         "xtend": "~4.0.1"
       }
     },
+    "node_modules/mitt": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/mitt/-/mitt-3.0.1.tgz",
+      "integrity": "sha512-vKivATfr97l2/QBCYAkXYDbrIWPM2IIKEl7YPhjCvKlG3kE2gm+uBo6nEXK3M5/Ffh/FLpKExzOQ3JJoJGFKBw=="
+    },
     "node_modules/mixin-deep": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/mixin-deep/-/mixin-deep-1.3.2.tgz",
diff --git a/package.json b/package.json
index 44fa4bd6..5f265c90 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "filenamify": "^6.0.0",
     "gifenc": "mattdesl/gifenc#64842fca317b112a8590f8fef2bf3825da8f6fe3",
     "jszip": "^3.7.1",
+    "mitt": "^3.0.1",
     "rollbar": "^2.24.0",
     "vue": "^3.1.5"
   },