diff --git a/js/package.json b/js/package.json
index 4c65811..f9ef949 100644
--- a/js/package.json
+++ b/js/package.json
@@ -5,6 +5,7 @@
     "devDependencies": {
         "@flarum/prettier-config": "^1.0.0",
         "@types/lodash-es": "^4.17.12",
+        "@types/mithril": "^2.2.7",
         "file-loader": "^6.2.0",
         "flarum-tsconfig": "^1.0.2",
         "flarum-webpack-config": "^2.0.0",
diff --git a/js/yarn.lock b/js/yarn.lock
index c776ebf..4f61182 100644
--- a/js/yarn.lock
+++ b/js/yarn.lock
@@ -1526,6 +1526,7 @@ __metadata:
   dependencies:
     "@flarum/prettier-config": "npm:^1.0.0"
     "@types/lodash-es": "npm:^4.17.12"
+    "@types/mithril": "npm:^2.2.7"
     external-load: "npm:^1.0.0"
     file-loader: "npm:^6.2.0"
     flarum-tsconfig: "npm:^1.0.2"
@@ -1746,7 +1747,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/mithril@npm:^2.0.7":
+"@types/mithril@npm:^2.0.7, @types/mithril@npm:^2.2.7":
   version: 2.2.7
   resolution: "@types/mithril@npm:2.2.7"
   checksum: 10c0/65533d9586fe75e3d8e2358dad6b4c72b605e2fca7774f32abf0417c5750b7e2aeba1748ec80218f0fb037032a72bc908a50b4e8e1fa4ff9b2adb6a934af44e2