diff --git a/web/packages/core/src/i18n.ts b/web/packages/core/src/internal/i18n.ts
similarity index 100%
rename from web/packages/core/src/i18n.ts
rename to web/packages/core/src/internal/i18n.ts
diff --git a/web/packages/core/src/register-element.ts b/web/packages/core/src/internal/register-element.ts
similarity index 100%
rename from web/packages/core/src/register-element.ts
rename to web/packages/core/src/internal/register-element.ts
diff --git a/web/packages/core/src/internal/ui/panic.tsx b/web/packages/core/src/internal/ui/panic.tsx
index cea627d1412d..fe222fdb9bf3 100644
--- a/web/packages/core/src/internal/ui/panic.tsx
+++ b/web/packages/core/src/internal/ui/panic.tsx
@@ -1,4 +1,4 @@
-import { text, textAsParagraphs } from "../../i18n";
+import { text, textAsParagraphs } from "../i18n";
 import { createRef } from "tsx-dom";
 import { buildInfo } from "../../build-info";
 import { RUFFLE_ORIGIN } from "../constants";
diff --git a/web/packages/core/src/ruffle-embed.ts b/web/packages/core/src/ruffle-embed.ts
index 5af3dc4c2906..97ff4a82dd8b 100644
--- a/web/packages/core/src/ruffle-embed.ts
+++ b/web/packages/core/src/ruffle-embed.ts
@@ -5,7 +5,7 @@ import {
     RufflePlayer,
     workaroundYoutubeMixedContent,
 } from "./ruffle-player";
-import { registerElement } from "./register-element";
+import { registerElement } from "./internal/register-element";
 import { isSwf } from "./swf-utils";
 
 /**
diff --git a/web/packages/core/src/ruffle-object.ts b/web/packages/core/src/ruffle-object.ts
index a873263d415b..397a45af9379 100644
--- a/web/packages/core/src/ruffle-object.ts
+++ b/web/packages/core/src/ruffle-object.ts
@@ -6,7 +6,7 @@ import {
     getPolyfillOptions,
 } from "./ruffle-player";
 import { FLASH_ACTIVEX_CLASSID } from "./flash-identifiers";
-import { registerElement } from "./register-element";
+import { registerElement } from "./internal/register-element";
 import { RuffleEmbed } from "./ruffle-embed";
 import { isSwf } from "./swf-utils";
 
diff --git a/web/packages/core/src/ruffle-player.tsx b/web/packages/core/src/ruffle-player.tsx
index cfdd46c184c2..bfa456afecd5 100644
--- a/web/packages/core/src/ruffle-player.tsx
+++ b/web/packages/core/src/ruffle-player.tsx
@@ -1,7 +1,7 @@
 import type { RuffleHandle, ZipWriter } from "../dist/ruffle_web";
 import { createRuffleBuilder } from "./load-ruffle";
 import { applyStaticStyles, ruffleShadowTemplate } from "./shadow-template";
-import { lookupElement } from "./register-element";
+import { lookupElement } from "./internal/register-element";
 import { DEFAULT_CONFIG } from "./config";
 import type { DataLoadOptions, URLLoadOptions } from "./load-options";
 import {
@@ -14,7 +14,7 @@ import {
 import type { MovieMetadata } from "./movie-metadata";
 import { swfFileName } from "./swf-utils";
 import { buildInfo } from "./build-info";
-import { text, textAsParagraphs } from "./i18n";
+import { text, textAsParagraphs } from "./internal/i18n";
 import { isExtension } from "./current-script";
 import { configureBuilder } from "./internal/builder";
 import { showPanicScreen } from "./internal/ui/panic";
diff --git a/web/packages/core/src/shadow-template.ts b/web/packages/core/src/shadow-template.ts
index b243b700dd01..330081873afa 100644
--- a/web/packages/core/src/shadow-template.ts
+++ b/web/packages/core/src/shadow-template.ts
@@ -1,4 +1,4 @@
-import { text } from "./i18n";
+import { text } from "./internal/i18n";
 
 /**
  * Insert all rules from array in the style sheet.
diff --git a/web/packages/core/src/source-api.ts b/web/packages/core/src/source-api.ts
index c326c6b061a1..b23380b99748 100644
--- a/web/packages/core/src/source-api.ts
+++ b/web/packages/core/src/source-api.ts
@@ -1,5 +1,5 @@
 import { pluginPolyfill, polyfill } from "./polyfills";
-import { registerElement } from "./register-element";
+import { registerElement } from "./internal/register-element";
 import { RufflePlayer } from "./ruffle-player";
 import { buildInfo } from "./build-info";
 import { InstallationOptions } from "./install";
diff --git a/web/packages/core/tsconfig.json b/web/packages/core/tsconfig.json
index bdd53f7419a0..b2c9fcad9b93 100644
--- a/web/packages/core/tsconfig.json
+++ b/web/packages/core/tsconfig.json
@@ -4,7 +4,7 @@
         "composite": true,
         "module": "es2020",
         "moduleResolution": "node",
-        "target": "es2017",
+        "target": "es2021",
         "rootDir": "src",
         "outDir": "dist",
         "jsx": "react-jsx",
diff --git a/web/packages/demo/tsconfig.json b/web/packages/demo/tsconfig.json
index a7fc6fbf23de..a008e3eab68b 100644
--- a/web/packages/demo/tsconfig.json
+++ b/web/packages/demo/tsconfig.json
@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    "target": "ES2020",
+    "target": "ES2021",
     "useDefineForClassFields": true,
     "lib": ["ES2020", "DOM", "DOM.Iterable"],
     "module": "ESNext",
diff --git a/web/packages/extension/jsconfig.json b/web/packages/extension/jsconfig.json
index b1e759dfe955..1acf274a581b 100644
--- a/web/packages/extension/jsconfig.json
+++ b/web/packages/extension/jsconfig.json
@@ -4,7 +4,7 @@
         "lib": ["es2021"],
         "module": "es2022",
         "moduleResolution": "node",
-        "target": "es2017",
+        "target": "es2021",
         "resolveJsonModule": true,
         "maxNodeModuleJsDepth": 0,
     },
diff --git a/web/packages/extension/tsconfig.json b/web/packages/extension/tsconfig.json
index 96acbb24a21a..799e0e9f3898 100644
--- a/web/packages/extension/tsconfig.json
+++ b/web/packages/extension/tsconfig.json
@@ -3,7 +3,7 @@
     "compilerOptions": {
         "module": "es2020",
         "moduleResolution": "node",
-        "target": "es2017",
+        "target": "es2021",
         "rootDir": "src",
     },
     "include": ["src/**/*"],
diff --git a/web/packages/selfhosted/tsconfig.json b/web/packages/selfhosted/tsconfig.json
index 15c955319620..84307e98a7ed 100644
--- a/web/packages/selfhosted/tsconfig.json
+++ b/web/packages/selfhosted/tsconfig.json
@@ -4,7 +4,7 @@
         "composite": true,
         "module": "es2020",
         "moduleResolution": "node",
-        "target": "es2017",
+        "target": "es2021",
         "rootDir": ".",
         "outDir": "dist",
         "types": ["node", "@wdio/globals/types", "@wdio/mocha-framework", "ruffle-core"]