diff --git a/packages/electron-updater/src/NsisUpdater.ts b/packages/electron-updater/src/NsisUpdater.ts
index 72582df0964..3a5aa9b034d 100644
--- a/packages/electron-updater/src/NsisUpdater.ts
+++ b/packages/electron-updater/src/NsisUpdater.ts
@@ -148,7 +148,7 @@ export class NsisUpdater extends BaseUpdater {
   private async differentialDownloadInstaller(fileInfo: ResolvedUpdateFileInfo, downloadUpdateOptions: DownloadUpdateOptions, installerPath: string, requestHeaders: OutgoingHttpHeaders, provider: Provider<any>) {
     try {
       const newBlockMapUrl = newUrlFromBase(`${fileInfo.url.pathname}.blockmap`, fileInfo.url)
-      const oldBlockMapUrl = newUrlFromBase(`${fileInfo.url.pathname.replace(downloadUpdateOptions.updateInfo.version, this.currentVersion.version)}.blockmap`, fileInfo.url)
+      const oldBlockMapUrl = newUrlFromBase(`${fileInfo.url.pathname.replace(new RegExp(downloadUpdateOptions.updateInfo.version, "g"), this.currentVersion.version)}.blockmap`, fileInfo.url)
       this._logger.info(`Download block maps (old: "${oldBlockMapUrl.href}", new: ${newBlockMapUrl.href})`)
 
       const downloadBlockMap = async (url: URL): Promise<BlockMap> => {