diff --git a/.github/workflows/update_dependencies.yml b/.github/workflows/update_dependencies.yml
index 6e3fd02..98692cd 100644
--- a/.github/workflows/update_dependencies.yml
+++ b/.github/workflows/update_dependencies.yml
@@ -25,8 +25,8 @@ jobs:
                   cache: pnpm
 
             - run: |
-                pnpm self-update
-                pnpm up --latest
+                  pnpm self-update
+                  pnpm up --latest
 
             - uses: peter-evans/create-pull-request@v7
               id: cpr
@@ -40,4 +40,4 @@ jobs:
               if: ${{ steps.cpr.outputs.pull-request-number }}
               with:
                   issue-number: ${{ steps.cpr.outputs.pull-request-number }}
-                  body: "CC: @Koenkk"
\ No newline at end of file
+                  body: 'CC: @Koenkk'
diff --git a/src/autodl/github.ts b/src/autodl/github.ts
index 8056803..6dc7303 100644
--- a/src/autodl/github.ts
+++ b/src/autodl/github.ts
@@ -66,7 +66,7 @@ export async function download(manufacturer: string, releasesUrl: string, assetF
         const release = getLatestImage(releases, sortByPublishedAt);
 
         if (release) {
-            const cachedData = readCacheJson<ReleasesJson | undefined>(manufacturer);
+            const cachedData = readCacheJson<ReleasesJson>(manufacturer);
             const cached = cachedData?.length ? getLatestImage(cachedData, sortByPublishedAt) : undefined;
 
             for (const assetFinder of assetFinders) {
diff --git a/src/autodl/ikea.ts b/src/autodl/ikea.ts
index f8f0b26..8ae681c 100644
--- a/src/autodl/ikea.ts
+++ b/src/autodl/ikea.ts
@@ -59,7 +59,7 @@ export async function download(): Promise<void> {
     const images = await getJson<ImagesJson>(NAME, PRODUCTION_FIRMWARE_URL);
 
     if (images?.length) {
-        const cachedData = readCacheJson<ImagesJson | undefined>(NAME);
+        const cachedData = readCacheJson<ImagesJson>(NAME);
 
         for (const image of images) {
             if (image.fw_type !== 2) {
diff --git a/src/autodl/ikea_new.ts b/src/autodl/ikea_new.ts
index ca40bac..3d066e2 100644
--- a/src/autodl/ikea_new.ts
+++ b/src/autodl/ikea_new.ts
@@ -50,7 +50,7 @@ export async function download(): Promise<void> {
     const images = await getJson<ImagesJson>(NAME, FIRMWARE_URL);
 
     if (images?.length) {
-        const cachedData = readCacheJson<ImagesJson | undefined>(CACHE_FILENAME);
+        const cachedData = readCacheJson<ImagesJson>(CACHE_FILENAME);
 
         for (const image of images) {
             if (image.fw_type !== 2) {
diff --git a/src/autodl/inovelli.ts b/src/autodl/inovelli.ts
index 7207e45..2aa10a9 100644
--- a/src/autodl/inovelli.ts
+++ b/src/autodl/inovelli.ts
@@ -41,7 +41,7 @@ export async function download(): Promise<void> {
     const models = await getJson<ModelsJson>(NAME, FIRMWARE_URL);
 
     if (models) {
-        const cachedData = readCacheJson<ModelsJson | undefined>(NAME);
+        const cachedData = readCacheJson<ModelsJson>(NAME);
 
         for (const model in models) {
             if (model == '') {
diff --git a/src/autodl/ledvance.ts b/src/autodl/ledvance.ts
index c303a3b..39e901d 100644
--- a/src/autodl/ledvance.ts
+++ b/src/autodl/ledvance.ts
@@ -77,7 +77,7 @@ export async function download(): Promise<void> {
     const images = await getJson<ImagesJson>(NAME, FIRMWARE_URL);
 
     if (images?.firmwares?.length) {
-        const cachedData = readCacheJson<ImagesJson | undefined>(NAME);
+        const cachedData = readCacheJson<ImagesJson>(NAME);
         const cachedDataByProduct = cachedData?.firmwares?.length ? groupByProduct(cachedData.firmwares) : undefined;
         const firmwareByProduct = groupByProduct(images.firmwares);
 
diff --git a/src/autodl/salus.ts b/src/autodl/salus.ts
index 7760835..5b95a4a 100644
--- a/src/autodl/salus.ts
+++ b/src/autodl/salus.ts
@@ -34,7 +34,7 @@ export async function download(): Promise<void> {
     const images = await getJson<ImagesJson>(NAME, FIRMWARE_URL);
 
     if (images?.versions?.length) {
-        const cachedData = readCacheJson<ImagesJson | undefined>(NAME);
+        const cachedData = readCacheJson<ImagesJson>(NAME);
 
         for (const image of images.versions) {
             const archiveUrl = image.url; //.replace(/^http:\/\//, 'https://');
diff --git a/src/autodl/ubisys.ts b/src/autodl/ubisys.ts
index 7a931ba..db9ca04 100644
--- a/src/autodl/ubisys.ts
+++ b/src/autodl/ubisys.ts
@@ -71,7 +71,7 @@ export async function download(): Promise<void> {
     if (pageText?.length) {
         const images = parseText(pageText);
         const imagesByType = groupByImageType(images);
-        const cachedData = readCacheJson<Image[] | undefined>(NAME);
+        const cachedData = readCacheJson<Image[]>(NAME);
         const cachedDataByType = cachedData ? groupByImageType(cachedData) : undefined;
 
         for (const imageType in imagesByType) {
diff --git a/src/common.ts b/src/common.ts
index 4b6f6cb..c10528e 100644
--- a/src/common.ts
+++ b/src/common.ts
@@ -93,7 +93,7 @@ export function writeCacheJson<T>(fileName: string, contents: T, basePath: strin
     writeFileSync(path.join(basePath, `${fileName}.json`), JSON.stringify(contents), 'utf8');
 }
 
-export function readCacheJson<T>(fileName: string, basePath: string = CACHE_DIR): T {
+export function readCacheJson<T>(fileName: string, basePath: string = CACHE_DIR): T | undefined {
     const filePath = path.join(basePath, `${fileName}.json`);
 
     return existsSync(filePath) ? JSON.parse(readFileSync(filePath, 'utf8')) : undefined;