diff --git a/package-lock.json b/package-lock.json
index 53cd59cfe..99add0555 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -40,7 +40,7 @@
                 "jest": "29.7.0",
                 "json-autotranslate": "1.14.5",
                 "lerna": "8.1.9",
-                "prettier": "2.8.8",
+                "prettier": "3.4.2",
                 "remark-cli": "12.0.1",
                 "remark-validate-links": "13.0.2",
                 "ts-jest": "29.2.5",
@@ -29089,16 +29089,16 @@
             }
         },
         "node_modules/prettier": {
-            "version": "2.8.8",
-            "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.8.8.tgz",
-            "integrity": "sha512-tdN8qQGvNjw4CHbY+XXk0JgCXn9QiF21a55rBe5LJAU+kDyC4WQn4+awm2Xfk2lQMk5fKup9XgzTZtGkjBdP9Q==",
+            "version": "3.4.2",
+            "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.4.2.tgz",
+            "integrity": "sha512-e9MewbtFo+Fevyuxn/4rrcDAaq0IYxPGLvObpQjiZBMAzB9IGmzlnG9RZy3FFas+eBMu2vA0CszMeduow5dIuQ==",
             "dev": true,
             "license": "MIT",
             "bin": {
-                "prettier": "bin-prettier.js"
+                "prettier": "bin/prettier.cjs"
             },
             "engines": {
-                "node": ">=10.13.0"
+                "node": ">=14"
             },
             "funding": {
                 "url": "https://github.com/prettier/prettier?sponsor=1"
diff --git a/package.json b/package.json
index 2d87e3835..1d9bef857 100644
--- a/package.json
+++ b/package.json
@@ -102,7 +102,7 @@
         "jest": "29.7.0",
         "json-autotranslate": "1.14.5",
         "lerna": "8.1.9",
-        "prettier": "2.8.8",
+        "prettier": "3.4.2",
         "remark-cli": "12.0.1",
         "remark-validate-links": "13.0.2",
         "ts-jest": "29.2.5",
diff --git a/packages/h5p-examples/src/expressRoutes.ts b/packages/h5p-examples/src/expressRoutes.ts
index 74f317c9b..adb84d4c6 100644
--- a/packages/h5p-examples/src/expressRoutes.ts
+++ b/packages/h5p-examples/src/expressRoutes.ts
@@ -28,7 +28,7 @@ export default function (
                     req.params.contentId,
                     req.user,
                     languageOverride === 'auto'
-                        ? req.language ?? 'en'
+                        ? (req.language ?? 'en')
                         : languageOverride,
                     {
                         showCopyButton: true,
@@ -82,7 +82,7 @@ export default function (
             const page = await h5pEditor.render(
                 req.params.contentId,
                 languageOverride === 'auto'
-                    ? req.language ?? 'en'
+                    ? (req.language ?? 'en')
                     : languageOverride,
                 req.user
             );
@@ -110,7 +110,7 @@ export default function (
             const page = await h5pEditor.render(
                 undefined,
                 languageOverride === 'auto'
-                    ? req.language ?? 'en'
+                    ? (req.language ?? 'en')
                     : languageOverride,
                 req.user
             );
diff --git a/packages/h5p-html-exporter/src/HtmlExporter.ts b/packages/h5p-html-exporter/src/HtmlExporter.ts
index 35f378722..6f94ba3a4 100644
--- a/packages/h5p-html-exporter/src/HtmlExporter.ts
+++ b/packages/h5p-html-exporter/src/HtmlExporter.ts
@@ -295,9 +295,8 @@ export default class HtmlExporter {
             return `/*!@license ${filename} by Joubel and other contributors, licensed under MIT license*/`;
         }
         if (library) {
-            let { author, license } = await this.libraryStorage.getLibrary(
-                library
-            );
+            let { author, license } =
+                await this.libraryStorage.getLibrary(library);
             if (!author || author === '') {
                 author = 'unknown';
             }
@@ -600,9 +599,8 @@ export default class HtmlExporter {
         await Promise.all(
             libraries.map(async (library) => {
                 const ubername = LibraryName.toUberName(library);
-                const allLibraryFiles = await this.libraryStorage.listFiles(
-                    library
-                );
+                const allLibraryFiles =
+                    await this.libraryStorage.listFiles(library);
                 const unusedLibraryFiles = allLibraryFiles.filter(
                     (filename) => {
                         if (
@@ -638,17 +636,16 @@ export default class HtmlExporter {
                 );
                 await Promise.all(
                     unusedLibraryFiles.map(async (unusedFile) => {
-                        result[
-                            `${ubername}/${unusedFile}`
-                        ] = `data:${mimetypes.lookup(
-                            path.basename(unusedFile)
-                        )};base64,${await streamToString(
-                            await this.libraryStorage.getFileStream(
-                                library,
-                                unusedFile
-                            ),
-                            'base64'
-                        )}`;
+                        result[`${ubername}/${unusedFile}`] =
+                            `data:${mimetypes.lookup(
+                                path.basename(unusedFile)
+                            )};base64,${await streamToString(
+                                await this.libraryStorage.getFileStream(
+                                    library,
+                                    unusedFile
+                                ),
+                                'base64'
+                            )}`;
                     })
                 );
             })
diff --git a/packages/h5p-mongos3/test/MongoLibraryStorage.test.ts b/packages/h5p-mongos3/test/MongoLibraryStorage.test.ts
index 2a4c366dd..25b8f9b50 100644
--- a/packages/h5p-mongos3/test/MongoLibraryStorage.test.ts
+++ b/packages/h5p-mongos3/test/MongoLibraryStorage.test.ts
@@ -136,9 +136,8 @@ describe('MongoS3LibraryStorage', () => {
                 minorVersion: 2
             }
         ]);
-        const libraryNames2 = await storage.getInstalledLibraryNames(
-            'H5P.Example1'
-        );
+        const libraryNames2 =
+            await storage.getInstalledLibraryNames('H5P.Example1');
         expect(libraryNames2).toMatchObject([
             {
                 machineName: 'H5P.Example1',
@@ -151,9 +150,8 @@ describe('MongoS3LibraryStorage', () => {
                 minorVersion: 2
             }
         ]);
-        const libraryNames3 = await storage.getInstalledLibraryNames(
-            'H5P.Example2'
-        );
+        const libraryNames3 =
+            await storage.getInstalledLibraryNames('H5P.Example2');
         expect(libraryNames3).toMatchObject([
             {
                 machineName: 'H5P.Example2',
diff --git a/packages/h5p-mongos3/test/MongoS3LibraryStorage.test.ts b/packages/h5p-mongos3/test/MongoS3LibraryStorage.test.ts
index 30784182f..4ff053af5 100644
--- a/packages/h5p-mongos3/test/MongoS3LibraryStorage.test.ts
+++ b/packages/h5p-mongos3/test/MongoS3LibraryStorage.test.ts
@@ -158,9 +158,8 @@ describe('MongoS3LibraryStorage', () => {
                 minorVersion: 2
             }
         ]);
-        const libraryNames2 = await storage.getInstalledLibraryNames(
-            'H5P.Example1'
-        );
+        const libraryNames2 =
+            await storage.getInstalledLibraryNames('H5P.Example1');
         expect(libraryNames2).toMatchObject([
             {
                 machineName: 'H5P.Example1',
@@ -173,9 +172,8 @@ describe('MongoS3LibraryStorage', () => {
                 minorVersion: 2
             }
         ]);
-        const libraryNames3 = await storage.getInstalledLibraryNames(
-            'H5P.Example2'
-        );
+        const libraryNames3 =
+            await storage.getInstalledLibraryNames('H5P.Example2');
         expect(libraryNames3).toMatchObject([
             {
                 machineName: 'H5P.Example2',
diff --git a/packages/h5p-rest-example-server/src/routes.ts b/packages/h5p-rest-example-server/src/routes.ts
index 0a13392fb..d4297172f 100644
--- a/packages/h5p-rest-example-server/src/routes.ts
+++ b/packages/h5p-rest-example-server/src/routes.ts
@@ -25,7 +25,7 @@ export default function (
                 req.params.contentId,
                 req.user,
                 languageOverride === 'auto'
-                    ? req.language ?? 'en'
+                    ? (req.language ?? 'en')
                     : languageOverride,
                 {
                     // We pass through the contextId here to illustrate how
@@ -77,7 +77,7 @@ export default function (
                     ? undefined
                     : req.params.contentId,
                 languageOverride === 'auto'
-                    ? req.language ?? 'en'
+                    ? (req.language ?? 'en')
                     : languageOverride,
                 req.user
             )) as H5P.IEditorModel;
diff --git a/packages/h5p-server/src/ContentHub.ts b/packages/h5p-server/src/ContentHub.ts
index af5be4742..8311926f2 100644
--- a/packages/h5p-server/src/ContentHub.ts
+++ b/packages/h5p-server/src/ContentHub.ts
@@ -13,7 +13,10 @@ export default class ContentHub {
      * @param config The configuration to use.
      * @param storage The storage object.
      */
-    constructor(private config: IH5PConfig, private storage: IKeyValueStorage) {
+    constructor(
+        private config: IH5PConfig,
+        private storage: IKeyValueStorage
+    ) {
         log.info(`initialize`);
         this.httpClient = HttpClient(config);
     }
diff --git a/packages/h5p-server/src/ContentScanner.ts b/packages/h5p-server/src/ContentScanner.ts
index fe24cc71b..f89e1965b 100644
--- a/packages/h5p-server/src/ContentScanner.ts
+++ b/packages/h5p-server/src/ContentScanner.ts
@@ -56,9 +56,8 @@ export class ContentScanner {
             )}`
         );
 
-        const mainSemantics = await this.libraryManager.getSemantics(
-            mainLibraryName
-        );
+        const mainSemantics =
+            await this.libraryManager.getSemantics(mainLibraryName);
         await this.walkSemanticsRecursive(
             mainSemantics,
             params,
@@ -169,9 +168,8 @@ export class ContentScanner {
                         useWhitespace: true
                     }
                 );
-                const subSemantics = await this.libraryManager.getSemantics(
-                    subLibraryName
-                );
+                const subSemantics =
+                    await this.libraryManager.getSemantics(subLibraryName);
                 await this.walkSemanticsRecursive(
                     subSemantics,
                     elementParams.params,
diff --git a/packages/h5p-server/src/H5PEditor.ts b/packages/h5p-server/src/H5PEditor.ts
index 3de60693d..349e57d63 100644
--- a/packages/h5p-server/src/H5PEditor.ts
+++ b/packages/h5p-server/src/H5PEditor.ts
@@ -1078,9 +1078,8 @@ export default class H5PEditor {
     ): Promise<IContentMetadata> {
         log.info(`generating h5p.json`);
 
-        const mainLibraryMetadata = await this.libraryManager.getLibrary(
-            mainLibrary
-        );
+        const mainLibraryMetadata =
+            await this.libraryManager.getLibrary(mainLibrary);
         const newMetadata: IContentMetadata = new ContentMetadata(
             metadata,
             { mainLibrary: mainLibraryMetadata.machineName },
diff --git a/packages/h5p-server/src/LibraryAdministration.ts b/packages/h5p-server/src/LibraryAdministration.ts
index 6cd6c55cc..da302dc17 100644
--- a/packages/h5p-server/src/LibraryAdministration.ts
+++ b/packages/h5p-server/src/LibraryAdministration.ts
@@ -33,9 +33,8 @@ export default class LibraryAdministration {
         const libraryName = await this.checkLibrary(ubername);
 
         // Check if library can be safely deleted
-        const usage = await this.contentManager.contentStorage.getUsage(
-            libraryName
-        );
+        const usage =
+            await this.contentManager.contentStorage.getUsage(libraryName);
         const dependentsCount =
             await this.libraryManager.libraryStorage.getDependentsCount(
                 libraryName
@@ -70,9 +69,8 @@ export default class LibraryAdministration {
                 log.debug(
                     `Getting usage data of ${LibraryName.toUberName(metadata)}`
                 );
-                const usage = await this.contentManager.contentStorage.getUsage(
-                    metadata
-                );
+                const usage =
+                    await this.contentManager.contentStorage.getUsage(metadata);
                 const dependentsCount =
                     dependents[LibraryName.toUberName(metadata)] ?? 0;
                 return {
diff --git a/packages/h5p-server/src/LibraryManager.ts b/packages/h5p-server/src/LibraryManager.ts
index 24900649b..aa4e78120 100644
--- a/packages/h5p-server/src/LibraryManager.ts
+++ b/packages/h5p-server/src/LibraryManager.ts
@@ -404,9 +404,8 @@ export default class LibraryManager {
                         let oldVersion: IFullLibraryName;
                         if (
                             // eslint-disable-next-line no-cond-assign
-                            (oldVersion = await this.isPatchedLibrary(
-                                newLibraryMetadata
-                            ))
+                            (oldVersion =
+                                await this.isPatchedLibrary(newLibraryMetadata))
                         ) {
                             // Update the library if it is only a patch of an existing library
                             await this.updateLibrary(
@@ -608,9 +607,8 @@ export default class LibraryManager {
             log.debug('Listing all installed libraries.');
         }
 
-        let libraries = await this.libraryStorage.getInstalledLibraryNames(
-            machineName
-        );
+        let libraries =
+            await this.libraryStorage.getInstalledLibraryNames(machineName);
         libraries = (
             await Promise.all(
                 libraries.map(async (libName) => {
@@ -646,9 +644,8 @@ export default class LibraryManager {
                     library
                 )}`
             );
-            const installedLanguages = await this.libraryStorage.getLanguages(
-                library
-            );
+            const installedLanguages =
+                await this.libraryStorage.getLanguages(library);
             // always include English as its the language of the semantics file
             if (!installedLanguages.includes('en')) {
                 installedLanguages.push('en');
diff --git a/packages/h5p-server/src/LibraryName.ts b/packages/h5p-server/src/LibraryName.ts
index 3ad503547..24fafe70c 100644
--- a/packages/h5p-server/src/LibraryName.ts
+++ b/packages/h5p-server/src/LibraryName.ts
@@ -69,8 +69,8 @@ export default class LibraryName implements ILibraryName {
             options.useHyphen && options.useWhitespace
                 ? /^([\w.]+)[-\s](\d+)\.(\d+)$/i
                 : options.useHyphen
-                ? /^([\w.]+)-(\d+)\.(\d+)$/i
-                : /^([\w.]+)\s(\d+)\.(\d+)$/i;
+                  ? /^([\w.]+)-(\d+)\.(\d+)$/i
+                  : /^([\w.]+)\s(\d+)\.(\d+)$/i;
 
         const result = nameRegex.exec(ubername);
 
diff --git a/packages/h5p-server/src/implementation/cache/CachedKeyValueStorage.ts b/packages/h5p-server/src/implementation/cache/CachedKeyValueStorage.ts
index d744b6cc2..9d94be0ea 100644
--- a/packages/h5p-server/src/implementation/cache/CachedKeyValueStorage.ts
+++ b/packages/h5p-server/src/implementation/cache/CachedKeyValueStorage.ts
@@ -10,7 +10,10 @@ export default class CachedKeyValueStorage implements IKeyValueStorage {
      * @param cache the cache backend, if left undefined, an in-memory cache is
      * created.
      */
-    constructor(private prefix: string, private cache?: Cache) {
+    constructor(
+        private prefix: string,
+        private cache?: Cache
+    ) {
         if (!this.cache) {
             this.cache = caching({
                 store: 'memory',
diff --git a/packages/h5p-server/src/implementation/cache/CachedLibraryStorage.ts b/packages/h5p-server/src/implementation/cache/CachedLibraryStorage.ts
index 7e3062fc5..2e61bd742 100644
--- a/packages/h5p-server/src/implementation/cache/CachedLibraryStorage.ts
+++ b/packages/h5p-server/src/implementation/cache/CachedLibraryStorage.ts
@@ -34,7 +34,10 @@ export default class CachedLibraryStorage implements ILibraryStorage {
      * used; **IMPORTANT: The default in-memory cache does not with
      * multi-process or multi-machine setups!**
      */
-    constructor(protected storage: ILibraryStorage, protected cache?: Cache) {
+    constructor(
+        protected storage: ILibraryStorage,
+        protected cache?: Cache
+    ) {
         if (!this.cache) {
             this.cache = caching({
                 store: 'memory',
diff --git a/packages/h5p-server/test/H5PPlayer.loadDependencies.test.ts b/packages/h5p-server/test/H5PPlayer.loadDependencies.test.ts
index 01e8196df..e1a61b38d 100644
--- a/packages/h5p-server/test/H5PPlayer.loadDependencies.test.ts
+++ b/packages/h5p-server/test/H5PPlayer.loadDependencies.test.ts
@@ -45,11 +45,11 @@ describe('Loading dependencies', () => {
                         ],
                         preloadedJs: [{ path: 'foo1.js' }, { path: 'foo2.js' }]
                     }
-                }[
+                })[
                     libName.machineName +
                         libName.majorVersion +
                         libName.minorVersion
-                ])
+                ]
         };
         return new H5PPlayer(
             mockLibraryStorage,
@@ -311,11 +311,11 @@ describe('Loading dependencies', () => {
                         ],
                         preloadedJs: [{ path: 'foo.js' }]
                     }
-                }[
+                })[
                     libName.machineName +
                         libName.majorVersion +
                         libName.minorVersion
-                ])
+                ]
         };
 
         return new H5PPlayer(
@@ -403,11 +403,11 @@ describe('Loading dependencies', () => {
                         ],
                         preloadedJs: [{ path: 'foo.js' }]
                     }
-                }[
+                })[
                     libName.machineName +
                         libName.majorVersion +
                         libName.minorVersion
-                ])
+                ]
         };
 
         return new H5PPlayer(
@@ -495,11 +495,11 @@ describe('Loading dependencies', () => {
                         ],
                         preloadedJs: [{ path: 'foo.js' }]
                     }
-                }[
+                })[
                     libName.machineName +
                         libName.majorVersion +
                         libName.minorVersion
-                ])
+                ]
         };
         const config = new H5PConfig(undefined, {
             baseUrl: '/baseUrl',
diff --git a/packages/h5p-server/test/LibraryManager.test.ts b/packages/h5p-server/test/LibraryManager.test.ts
index 4cb4659eb..f87e83b2a 100644
--- a/packages/h5p-server/test/LibraryManager.test.ts
+++ b/packages/h5p-server/test/LibraryManager.test.ts
@@ -25,9 +25,8 @@ describe('basic file library manager functionality', () => {
             new FileLibraryStorage(`${__dirname}/../../../test/data/libraries`)
         );
 
-        const libraryObject = await libManager.listInstalledLibraries(
-            'H5P.Example3'
-        );
+        const libraryObject =
+            await libManager.listInstalledLibraries('H5P.Example3');
         expect(Object.keys(libraryObject).length).toEqual(1);
     });
 
@@ -36,9 +35,8 @@ describe('basic file library manager functionality', () => {
             new FileLibraryStorage(`${__dirname}/../../../test/data/libraries`)
         );
 
-        const libraryObject = await libManager.listInstalledLibraries(
-            'H5P.Example1'
-        );
+        const libraryObject =
+            await libManager.listInstalledLibraries('H5P.Example1');
         expect(
             await libManager.isPatchedLibrary(libraryObject['H5P.Example1'][0])
         ).toBeUndefined();
diff --git a/packages/h5p-server/test/PackageExporter.test.ts b/packages/h5p-server/test/PackageExporter.test.ts
index 0ba3c0656..349cd91a1 100644
--- a/packages/h5p-server/test/PackageExporter.test.ts
+++ b/packages/h5p-server/test/PackageExporter.test.ts
@@ -73,9 +73,8 @@ export function importAndExportPackage(
                         writeStream.on('close', async () => {
                             expect(whenStreamClosed).toBeCalled();
 
-                            const oldZipFile = await yauzlPromise.open(
-                                packagePath
-                            );
+                            const oldZipFile =
+                                await yauzlPromise.open(packagePath);
                             const oldEntries = (await oldZipFile.readEntries())
                                 .map((e) => e.fileName)
                                 .sort();
diff --git a/packages/h5p-server/test/implementation/cache/CachedLibraryStorage.test.ts b/packages/h5p-server/test/implementation/cache/CachedLibraryStorage.test.ts
index a99a070c5..1b8266f4d 100644
--- a/packages/h5p-server/test/implementation/cache/CachedLibraryStorage.test.ts
+++ b/packages/h5p-server/test/implementation/cache/CachedLibraryStorage.test.ts
@@ -89,10 +89,10 @@ describe('CachedLibraryStorage', () => {
         const uncachedStorage = new FileLibraryStorage(
             options?.useTemporaryDirectory
                 ? tempDir.path
-                : options?.directory ??
+                : (options?.directory ??
                   path.resolve(
                       `${__dirname}/../../../../../test/data/libraries`
-                  )
+                  ))
         );
         const cachedStorage = new CachedLibraryStorage(
             uncachedStorage,