diff --git a/package-lock.json b/package-lock.json
index 132520ab0d..73e48d813b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -25,14 +25,14 @@
         "dompurify": "3.0.1",
         "epubjs": "0.4.2",
         "escape-html": "1.0.3",
-        "event-target-polyfill": "0.0.3",
+        "event-target-polyfill": "github:ThaUnknown/event-target-polyfill",
         "fast-text-encoding": "1.0.6",
         "flv.js": "1.6.2",
         "headroom.js": "0.12.0",
         "history": "5.3.0",
         "hls.js": "1.3.4",
         "intersection-observer": "0.12.2",
-        "jassub": "1.5.4",
+        "jassub": "1.5.5",
         "jellyfin-apiclient": "1.10.0",
         "jquery": "3.6.3",
         "jstree": "3.3.15",
@@ -7296,8 +7296,8 @@
     },
     "node_modules/event-target-polyfill": {
       "version": "0.0.3",
-      "resolved": "https://registry.npmjs.org/event-target-polyfill/-/event-target-polyfill-0.0.3.tgz",
-      "integrity": "sha512-ZMc6UuvmbinrCk4RzGyVmRyIsAyxMRlp4CqSrcQRO8Dy0A9ldbiRy5kdtBj4OtP7EClGdqGfIqo9JmOClMsGLQ=="
+      "resolved": "git+ssh://git@github.com/ThaUnknown/event-target-polyfill.git#5152219bdee9bc18ab0a1cccddab48a813c20b81",
+      "license": "MIT"
     },
     "node_modules/eventemitter3": {
       "version": "4.0.7",
@@ -9653,9 +9653,9 @@
       }
     },
     "node_modules/jassub": {
-      "version": "1.5.4",
-      "resolved": "https://registry.npmjs.org/jassub/-/jassub-1.5.4.tgz",
-      "integrity": "sha512-pSuEwSoQ2pjrfVhMJ+iNb7WcwrzzKNU+Q0VWptkeWPJx7abeNxPMS3zX0c6bpMyGLYaTh5Uc6MePEFni4tDv6A==",
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/jassub/-/jassub-1.5.5.tgz",
+      "integrity": "sha512-PduISAKqGZYMRnaO7v9HKYaR2/q8U6tTQK2hKSJtUGucWcAM1kS4Rsqwf7qbtB++UmfQYxuG1fN4VixfiA2iOA==",
       "dependencies": {
         "rvfc-polyfill": "^1.0.4"
       }
@@ -24491,9 +24491,8 @@
       }
     },
     "event-target-polyfill": {
-      "version": "0.0.3",
-      "resolved": "https://registry.npmjs.org/event-target-polyfill/-/event-target-polyfill-0.0.3.tgz",
-      "integrity": "sha512-ZMc6UuvmbinrCk4RzGyVmRyIsAyxMRlp4CqSrcQRO8Dy0A9ldbiRy5kdtBj4OtP7EClGdqGfIqo9JmOClMsGLQ=="
+      "version": "git+ssh://git@github.com/ThaUnknown/event-target-polyfill.git#5152219bdee9bc18ab0a1cccddab48a813c20b81",
+      "from": "event-target-polyfill@github:ThaUnknown/event-target-polyfill"
     },
     "eventemitter3": {
       "version": "4.0.7",
@@ -26246,9 +26245,9 @@
       "dev": true
     },
     "jassub": {
-      "version": "1.5.4",
-      "resolved": "https://registry.npmjs.org/jassub/-/jassub-1.5.4.tgz",
-      "integrity": "sha512-pSuEwSoQ2pjrfVhMJ+iNb7WcwrzzKNU+Q0VWptkeWPJx7abeNxPMS3zX0c6bpMyGLYaTh5Uc6MePEFni4tDv6A==",
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/jassub/-/jassub-1.5.5.tgz",
+      "integrity": "sha512-PduISAKqGZYMRnaO7v9HKYaR2/q8U6tTQK2hKSJtUGucWcAM1kS4Rsqwf7qbtB++UmfQYxuG1fN4VixfiA2iOA==",
       "requires": {
         "rvfc-polyfill": "^1.0.4"
       }
diff --git a/package.json b/package.json
index a7da1b1b40..c7f30f6a84 100644
--- a/package.json
+++ b/package.json
@@ -84,14 +84,14 @@
     "dompurify": "3.0.1",
     "epubjs": "0.4.2",
     "escape-html": "1.0.3",
-    "event-target-polyfill": "0.0.3",
+    "event-target-polyfill": "github:ThaUnknown/event-target-polyfill",
     "fast-text-encoding": "1.0.6",
     "flv.js": "1.6.2",
     "headroom.js": "0.12.0",
     "history": "5.3.0",
     "hls.js": "1.3.4",
     "intersection-observer": "0.12.2",
-    "jassub": "1.5.4",
+    "jassub": "1.5.5",
     "jellyfin-apiclient": "1.10.0",
     "jquery": "3.6.3",
     "jstree": "3.3.15",
diff --git a/src/plugins/htmlVideoPlayer/plugin.js b/src/plugins/htmlVideoPlayer/plugin.js
index 80d8c66cb0..ab38df6d5d 100644
--- a/src/plugins/htmlVideoPlayer/plugin.js
+++ b/src/plugins/htmlVideoPlayer/plugin.js
@@ -1269,12 +1269,12 @@ function tryRemoveElement(elem) {
                 subUrl: getTextTrackUrl(track, item),
                 fonts: avaliableFonts,
                 fallbackFont: 'liberation sans',
-                availableFonts: {'liberation sans': `${appRouter.baseUrl()}/libraries/default.woff2`},
+                availableFonts: {'liberation sans': `${appRouter.baseUrl()}/default.woff2`},
                 // Disabled eslint compat, but is safe as corejs3 polyfills URL
                 // eslint-disable-next-line compat/compat
-                workerUrl: `${appRouter.baseUrl()}${new URL('jassub/dist/jassub-worker.js', import.meta.url).pathname}`,
+                workerUrl: new URL('jassub/dist/jassub-worker.js', import.meta.url),
                 // eslint-disable-next-line compat/compat
-                legacyWorkerUrl: `${appRouter.baseUrl()}${new URL('jassub/dist/jassub-worker-legacy.js', import.meta.url).pathname}`,
+                legacyWorkerUrl: new URL('jassub/dist/jassub-worker-legacy.js', import.meta.url),
                 timeOffset: (this._currentPlayOptions.transcodingOffsetTicks || 0) / 10000000,
                 // new jassub options; override all, even defaults
                 blendMode: 'js',
@@ -1291,6 +1291,7 @@ function tryRemoveElement(elem) {
                 prescaleHeightLimit: 1080,
                 maxRenderHeight: 2160
             };
+            // TODO: replace with `event-target-polyfill` once https://github.com/benlesh/event-target-polyfill/pull/12 or 11 is merged
             import('event-target-polyfill').then(() => {
                 import('jassub').then(({ default: JASSUB }) => {
                     Promise.all([