diff --git a/electron/blocker/blocker.ts b/electron/blocker/blocker.ts
index 456fda1..d7c5fac 100644
--- a/electron/blocker/blocker.ts
+++ b/electron/blocker/blocker.ts
@@ -81,7 +81,7 @@ export class BlockerIntegration {
     // Temp fix -- manually override adblocker's preload script
     // to point to CJS  that has been copied over with config in webpack.config.js
     // require.resolve('@cliqz/adblocker-electron-preload');
-    const preloadScript =  path.join(electron.app.getAppPath(), './preview/assets/adblocker/preload.cjs');
+    const preloadScript =  path.join(electron.app.getAppPath(), './preview/assets/adblocker/preload.cjs.js');
 
     // const originPath = require.resolve('@cliqz/adblocker-electron-preload');
     // const preloadScript = path.resolve(path.dirname(originPath), 'preload.cjs');
diff --git a/electron/webpack.config.js b/electron/webpack.config.js
index f1d8600..4f4c109 100644
--- a/electron/webpack.config.js
+++ b/electron/webpack.config.js
@@ -126,7 +126,8 @@ const mainConfig = {
                     },
                     {
                         from: path.resolve(__dirname, '..', 'node_modules', '@cliqz', 'adblocker-electron-preload', 'dist', 'cjs', 'preload.cjs').replace(/\\/g, '/'),
-                        to: path.join('preview', 'assets', 'adblocker'),
+                        to: path.join('preview', 'assets', 'adblocker', 'preload.cjs.js'),
+                        toType: 'file',
                         context: path.resolve(__dirname, '..', 'node_modules', '@cliqz', 'adblocker-electron-preload', 'dist')
                     },
                     {
diff --git a/package.json b/package.json
index 041ab57..fc8271d 100644
--- a/package.json
+++ b/package.json
@@ -63,8 +63,8 @@
   },
   "optionalDependencies": {
     "appdmg": "^0.6.0",
-    "electron-squirrel-startup": "^1.0.0",
-    "electron-winstaller": "~5.2.1"
+    "electron-squirrel-startup": "1.0.0",
+    "electron-winstaller": "5.2.1"
   },
   "resolutions": {
     "vue": "2.6.12",
diff --git a/yarn.lock b/yarn.lock
index 79fc530..fe09c46 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2697,10 +2697,10 @@ electron-settings@~4.0.2:
     mkdirp "^1.0.4"
     write-file-atomic "^3.0.3"
 
-electron-squirrel-startup@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/electron-squirrel-startup/-/electron-squirrel-startup-1.0.1.tgz#c9171568d724884c7a2b03760bfeedcf921c63ab"
-  integrity sha512-sTfFIHGku+7PsHLJ7v0dRcZNkALrV+YEozINTW8X1nM//e5O3L+rfYuvSW00lmGHnYmUjARZulD8F2V8ISI9RA==
+electron-squirrel-startup@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/electron-squirrel-startup/-/electron-squirrel-startup-1.0.0.tgz#19b4e55933fa0ef8f556784b9c660f772546a0b8"
+  integrity sha512-Oce8mvgGdFmwr+DsAcXBmFK8jFfN6yaFAP9IvyhTfupM3nFkBku/7VS/mdtJteWumImkC6P+BKGsxScoDDkv9Q==
   dependencies:
     debug "^2.2.0"
 
@@ -2709,10 +2709,10 @@ electron-to-chromium@^1.3.47, electron-to-chromium@^1.4.796:
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.4.818.tgz#7762c8bfd15a07c3833b7f5deed990e9e5a4c24f"
   integrity sha512-eGvIk2V0dGImV9gWLq8fDfTTsCAeMDwZqEPMr+jMInxZdnp9Us8UpovYpRCf9NQ7VOFgrN2doNSgvISbsbNpxA==
 
-electron-winstaller@~5.2.1:
-  version "5.2.2"
-  resolved "https://registry.yarnpkg.com/electron-winstaller/-/electron-winstaller-5.2.2.tgz#529a3528a0dcb36268c0c5048d0f05ed0cedfb4f"
-  integrity sha512-nw+SbS0DA6SF8bEkcL4SqtPOoLKc5JkEXAz7kzdzz22rY12PZRtTn9zpztbwy+xrLqSBBFR1u0bdvNLpvlmrkw==
+electron-winstaller@5.2.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/electron-winstaller/-/electron-winstaller-5.2.1.tgz#1a22d8125f35745a9fbbe7c0aa1e91d0556d520e"
+  integrity sha512-2UuvOGMLLGJioIBsqWANF1A19G7uJuIifae8/pR3FClI21aCJc5nutAOGnZI17kkxUc47UqByqKOl0XSVtwAlQ==
   dependencies:
     "@electron/asar" "^3.2.1"
     debug "^4.1.1"