diff --git a/CHANGES.md b/CHANGES.md
index 2213bdbe..c86bfa32 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -3,7 +3,7 @@
 ## CHANGES
 
 v2.2.2
-- Fidelity: Update to wabac.js 2.20.2, wombat 3.8.5 for cache-override related fidelity improvements
+- Fidelity: Update to wabac.js 2.20.3, wombat 3.8.6 for cache-override and worker rewrite improvements
 
 v2.2.1
 - Fidelity: Update to wabac.js 2.20.1 for document.write() comment frame detection improvement
diff --git a/package.json b/package.json
index 7ccdd6ff..2a274e67 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   "dependencies": {
     "@fortawesome/fontawesome-free": "^5.15.4",
     "@shoelace-style/shoelace": "~2.15.1",
-    "@webrecorder/wabac": "^2.20.2",
+    "@webrecorder/wabac": "^2.20.3",
     "bulma": "^0.9.3",
     "electron-log": "^4.4.1",
     "electron-updater": "^6.3.2",
diff --git a/yarn.lock b/yarn.lock
index 09bcce22..70413a66 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1021,16 +1021,16 @@
   resolved "https://registry.yarnpkg.com/@webpack-cli/serve/-/serve-2.0.5.tgz#325db42395cd49fe6c14057f9a900e427df8810e"
   integrity sha512-lqaoKnRYBdo1UgDX8uF24AfGMifWK19TxPmM5FHc2vAGxrJ/qtyUyFBWoY1tISZdelsQ5fBcOusifo5o5wSJxQ==
 
-"@webrecorder/wabac@^2.20.2":
-  version "2.20.2"
-  resolved "https://registry.yarnpkg.com/@webrecorder/wabac/-/wabac-2.20.2.tgz#adf5c77f2dcf04b3f03897fc4c23444ca3f43155"
-  integrity sha512-5O0T0a0rGrDMXVsYOENJfk28azQzr/0obbM4Dps1RexdUYK/Vk01gNov+IKetKuYPP1sKoAi+7s4d0h3PWmjOg==
+"@webrecorder/wabac@^2.20.3":
+  version "2.20.3"
+  resolved "https://registry.yarnpkg.com/@webrecorder/wabac/-/wabac-2.20.3.tgz#4e3faa476477b64ba2c2315f57d38372d0acf4c0"
+  integrity sha512-bik2YbIJwox5LctL3QwZ1pvG89ORR31do3mFHTF1l4zcvjqeLoqCHIImEsgl9uH7KYq27UxeG4y25Jo3PxA5qQ==
   dependencies:
     "@peculiar/asn1-ecc" "^2.3.4"
     "@peculiar/asn1-schema" "^2.3.3"
     "@peculiar/x509" "^1.9.2"
     "@types/js-levenshtein" "^1.1.3"
-    "@webrecorder/wombat" "^3.8.5"
+    "@webrecorder/wombat" "^3.8.6"
     acorn "^8.10.0"
     auto-js-ipfs "^2.1.1"
     base64-js "^1.5.1"
@@ -1051,10 +1051,10 @@
     stream-browserify "^3.0.0"
     warcio "^2.4.0"
 
-"@webrecorder/wombat@^3.8.5":
-  version "3.8.5"
-  resolved "https://registry.yarnpkg.com/@webrecorder/wombat/-/wombat-3.8.5.tgz#f62b18412c9e72d896c9604bbefe77c6fd9c43ea"
-  integrity sha512-yQDycwPtOmwNQUg/ro1xz4c5NWvgdszIllayYXV2WmyCJv27Gj1VJAXtBoEAVQffOl0Q14JVtMs+IaAEY67F9Q==
+"@webrecorder/wombat@^3.8.6":
+  version "3.8.6"
+  resolved "https://registry.yarnpkg.com/@webrecorder/wombat/-/wombat-3.8.6.tgz#3aa99d9519f6263434a9e0b963f6ef86d3e0494a"
+  integrity sha512-+IxV0bkoc6QdHYzwejsPFPC31dRjaxa6zGuR9F08aFb4Ooeekf9AK16ZIYweizs/wm7nvTG5E12ZwW0LUUzX8w==
   dependencies:
     warcio "^2.4.0"