diff --git a/app/.eslintrc.js b/app/.eslintrc.js
index 6dfd3ab..3d77926 100644
--- a/app/.eslintrc.js
+++ b/app/.eslintrc.js
@@ -34,7 +34,7 @@ module.exports = {
   },
   parserOptions: {
     parser: '@typescript-eslint/parser',
-    ecmaVersion: 2018,
+    ecmaVersion: 2019,
     sourceType: 'module',
     project: './tsconfig.json',
     tsconfigRootDir: __dirname,
diff --git a/app/script/release-download-count.ts b/app/script/release-download-count.ts
index 92f0e57..4bb0ca5 100644
--- a/app/script/release-download-count.ts
+++ b/app/script/release-download-count.ts
@@ -1,6 +1,6 @@
 import { get } from 'https'
 
-const repeat = (s: string, n: number) => {
+const repeat = (s: string, n: number): string => {
   if (n < 0) throw new Error('repeat(s, n < 0)')
   let str = ''
   for (let i = 0; i < n; i++) {
@@ -17,23 +17,23 @@ get({
   }
 }, (response) => {
   let body = ''
-  response.on('data',chunk => body += chunk)
+  response.on('data', (chunk: string) => { body += chunk })
   response.on('end', () => {
     console.log('Release' + repeat(' ', 40 - 7) + 'Download Count\n')
 
-    let res = JSON.parse(body)
+    const res = JSON.parse(body)
     let total = 0
     let lineCount = 0
     try {
       for (const release of res) {
         for (const asset of release.assets) {
-          total += asset.download_count
-          let line = asset.name + repeat(' ', 40 - asset.name.length) + asset.download_count
+          total += asset.download_count as number
+          const line = `${asset.name}${repeat(' ', 40 - asset.name.length)}${asset.download_count}`
           if (lineCount < 20) console.log(line)
           lineCount++
         }
       }
-      console.log('\nTotal' + repeat(' ', 40 - 5) + total)
+      console.log(`\nTotal${repeat(' ', 40 - 5)}${total}`)
     } catch (err) {
       console.log(res)
     }
diff --git a/app/src/ts/renderer-back.ts b/app/src/ts/renderer-back.ts
index 66bff30..8e1fd8c 100644
--- a/app/src/ts/renderer-back.ts
+++ b/app/src/ts/renderer-back.ts
@@ -16,7 +16,7 @@ ipcRenderer.on('openManifestDatabase', async (event, callbackChannel: string, pa
   try {
     manifest = await DB.open(path)
     event.sender.sendTo(mainWindowId, callbackChannel, null)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message)
   }
 })
@@ -29,7 +29,7 @@ ipcRenderer.on('openMasterDatabase', async (event, callbackChannel: string, path
   try {
     master = await DB.open(path)
     event.sender.sendTo(mainWindowId, callbackChannel, null)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message)
   }
 })
@@ -38,7 +38,7 @@ ipcRenderer.on('getMasterHash', async (event, callbackChannel: string) => {
   try {
     const masterHash = (await manifest!.find('manifests', ['name', 'hash'], { name: 'master.mdb' }))[0].hash as string
     event.sender.sendTo(mainWindowId, callbackChannel, null, masterHash)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message, '')
   }
 })
@@ -50,7 +50,7 @@ ipcRenderer.on('readMasterData', async (event, callbackChannel: string, masterFi
     await master.close()
     master = null
     event.sender.sendTo(mainWindowId, callbackChannel, null, masterData)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message, '')
   }
 })
@@ -59,7 +59,7 @@ ipcRenderer.on('getCardHash', async (event, callbackChannel: string, id: string
   try {
     const res = await manifest!.find('manifests', ['hash'], { name: `card_bg_${id}.unity3d` })
     event.sender.sendTo(mainWindowId, callbackChannel, null, res[0].hash)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message, '')
   }
 })
@@ -68,7 +68,7 @@ ipcRenderer.on('getIconHash', async (event, callbackChannel: string, id: string
   try {
     const res = await manifest!.findOne('manifests', ['hash'], { name: `card_${id}_m.unity3d` })
     event.sender.sendTo(mainWindowId, callbackChannel, null, res.hash)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message, '')
   }
 })
@@ -77,7 +77,7 @@ ipcRenderer.on('getEmblemHash', async (event, callbackChannel: string, id: strin
   try {
     const res = await manifest!.findOne('manifests', ['hash'], { name: `emblem_${id}_l.unity3d` })
     event.sender.sendTo(mainWindowId, callbackChannel, null, res.hash)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message, '')
   }
 })
@@ -86,7 +86,7 @@ ipcRenderer.on('searchResources', async (event, callbackChannel: string, querySt
   try {
     const res = await manifest!.find<{ name: string, hash: string }>('manifests', ['name', 'hash', 'size'], { name: { $like: `%${queryString.trim()}%` } })
     event.sender.sendTo(mainWindowId, callbackChannel, null, res)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message, '')
   }
 })
@@ -98,7 +98,7 @@ ipcRenderer.on('startBatchDownload', async (event, callbackChannel: string) => {
     batchDownloading = true
     await batchDownload(manifest!)
     event.sender.sendTo(mainWindowId, callbackChannel, null, batchDownloading)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message, '')
   }
 })
@@ -108,7 +108,7 @@ ipcRenderer.on('stopBatchDownload', async (event, callbackChannel: string) => {
     await batchStop()
     batchDownloading = false
     event.sender.sendTo(mainWindowId, callbackChannel, null, batchDownloading)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message, '')
   }
 })
@@ -117,7 +117,7 @@ ipcRenderer.on('getBatchErrorList', (event, callbackChannel: string) => {
   try {
     const list = getBatchErrorList()
     event.sender.sendTo(mainWindowId, callbackChannel, null, list)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message, null)
   }
 })
@@ -126,7 +126,7 @@ ipcRenderer.on('setDownloaderProxy', (event, callbackChannel: string, proxy: str
   try {
     setDownloaderProxy(proxy)
     event.sender.sendTo(mainWindowId, callbackChannel, null)
-  } catch (err) {
+  } catch (err: any) {
     event.sender.sendTo(mainWindowId, callbackChannel, err.message)
   }
 })
diff --git a/app/src/ts/renderer/back/batch-download.ts b/app/src/ts/renderer/back/batch-download.ts
index 3473bef..64e23a7 100644
--- a/app/src/ts/renderer/back/batch-download.ts
+++ b/app/src/ts/renderer/back/batch-download.ts
@@ -120,7 +120,7 @@ export async function batchDownload (manifest: DB): Promise<void> {
       })
       await currentDownloadPromise
       currentDownloadPromise = null
-    } catch (err) {
+    } catch (err: any) {
       if (stopBatch) {
         currentDownloadPromise = null
         break
diff --git a/app/src/ts/renderer/mishiro-commu.ts b/app/src/ts/renderer/mishiro-commu.ts
index 523a112..b824215 100644
--- a/app/src/ts/renderer/mishiro-commu.ts
+++ b/app/src/ts/renderer/mishiro-commu.ts
@@ -165,7 +165,7 @@ export default class extends Vue {
     let res: ServerResponse
     try {
       res = await getProfile(/* '646406677' */this.queryString)
-    } catch (err) {
+    } catch (err: any) {
       this.isSearching = false
       this.event.$emit('alert', this.$t('home.errorTitle'), err.message)
       return
@@ -218,7 +218,7 @@ export default class extends Vue {
           emblemB64 = readFileSync(emblemCache + '.png').toString('base64')
         }
       }
-    } catch (err) {
+    } catch (err: any) {
       console.error(err)
       this.event.$emit('alert', this.$t('home.errorTitle'), err.message)
     }
@@ -236,8 +236,9 @@ export default class extends Vue {
       return
     }
     this.renderer.canvas.toBlob((blob) => {
+      if (!blob) return
       const a = document.createElement('a')
-      a.download = 'test.png'
+      a.download = `${this.queryString}.png`
       a.href = URL.createObjectURL(blob)
       const event = new MouseEvent('click', {
         view: window,
diff --git a/app/src/ts/renderer/mishiro-home.ts b/app/src/ts/renderer/mishiro-home.ts
index 3f8a11a..78dcd89 100644
--- a/app/src/ts/renderer/mishiro-home.ts
+++ b/app/src/ts/renderer/mishiro-home.ts
@@ -160,7 +160,7 @@ export default class extends Vue {
       const usmFile = result.filePaths[i]
       try {
         await this.core.movie.demuxAsync(usmFile)
-      } catch (err) {
+      } catch (err: any) {
         error(`USM: ${err.message}`)
       }
     }
diff --git a/app/src/ts/renderer/mishiro-idol.ts b/app/src/ts/renderer/mishiro-idol.ts
index 0e0de40..de40be6 100644
--- a/app/src/ts/renderer/mishiro-idol.ts
+++ b/app/src/ts/renderer/mishiro-idol.ts
@@ -476,8 +476,8 @@ export default class extends Vue {
           this.cardDownloadPromise = null
           return downloadResult
         }
-      } catch (_err) {
-        if (_err.message !== 'abort') {
+      } catch (err: any) {
+        if (err.message !== 'abort') {
           this.cardDownloadPromise = this.dler.downloadSpread(
             id.toString(),
             cardDir(`bg_${id}.png`),
@@ -487,7 +487,7 @@ export default class extends Vue {
           this.cardDownloadPromise = null
           return downloadResult
         } else {
-          throw _err
+          throw err
         }
       }
     }
diff --git a/app/src/ts/renderer/mishiro-update.ts b/app/src/ts/renderer/mishiro-update.ts
index 950f0b6..89c17b6 100644
--- a/app/src/ts/renderer/mishiro-update.ts
+++ b/app/src/ts/renderer/mishiro-update.ts
@@ -288,7 +288,7 @@ export default class extends Vue {
         if (getBackgroundResult/*  && getBackgroundResult !== 'await ipc' */) {
           this.event.$emit('eventBgReady', id)
         }
-      } catch (err) {
+      } catch (err: any) {
         this.event.$emit('alert', this.$t('home.errorTitle'), (this.$t('home.downloadFailed') as string) + '<br/>' + (err.toString() as string))
       }
     }
@@ -362,7 +362,7 @@ export default class extends Vue {
               this.text = this.$t('update.check') as string
               this.loading = 0
               resVer = await this.getResVer()
-            } catch (err) {
+            } catch (err: any) {
               console.error(err)
               error(`UPDATE getResVer: ${err.stack}`)
               if (Number(err.message) === 203) {
diff --git a/app/src/ts/renderer/modal-version.ts b/app/src/ts/renderer/modal-version.ts
index b2c2a66..3a531ba 100644
--- a/app/src/ts/renderer/modal-version.ts
+++ b/app/src/ts/renderer/modal-version.ts
@@ -38,7 +38,7 @@ export default class extends mixins(modalMixin) {
           this.btnDisabled = false
           this.updateProgress = 0
         }
-      } catch (err) {
+      } catch (err: any) {
         updater.onDownload(null)
         this.btnDisabled = false
         this.event.$emit('alert', this.$t('home.errorTitle'), err.message)
diff --git a/app/src/vue/modal/ModalOption.vue b/app/src/vue/modal/ModalOption.vue
index 305fa4d..f08cb54 100644
--- a/app/src/vue/modal/ModalOption.vue
+++ b/app/src/vue/modal/ModalOption.vue
@@ -168,7 +168,7 @@ export default class extends mixins(modalMixin) {
     this.batchDownloading = true
     try {
       await startBatchDownload()
-    } catch (err) {
+    } catch (err: any) {
       this.event.$emit('alert', this.$t('home.errorTitle'), err.message)
     }
     this.batchDownloading = false