diff --git a/packages/osd-optimizer/package.json b/packages/osd-optimizer/package.json
index 5a88bfc16dc2..dabefa799556 100644
--- a/packages/osd-optimizer/package.json
+++ b/packages/osd-optimizer/package.json
@@ -26,19 +26,20 @@
     "dedent": "^0.7.0",
     "del": "^5.1.0",
     "execa": "^4.0.2",
+    "fibers": "^5.0.3",
     "file-loader": "^4.2.0",
     "jest-diff": "^27.5.1",
     "js-yaml": "^3.14.0",
     "json-stable-stringify": "^1.0.1",
     "lmdb-store": "^1.6.11",
     "loader-utils": "^1.2.3",
-    "sass": "~1.26.11",
     "normalize-path": "^3.0.0",
     "pirates": "^4.0.1",
     "postcss": "^8.4.5",
     "postcss-loader": "^4.2.0",
     "raw-loader": "^4.0.2",
     "rxjs": "^6.5.5",
+    "sass": "~1.26.11",
     "sass-loader": "^10.2.0",
     "source-map-support": "^0.5.19",
     "style-loader": "^1.1.3",
diff --git a/packages/osd-optimizer/src/worker/webpack.config.ts b/packages/osd-optimizer/src/worker/webpack.config.ts
index de0ab1c55c0a..1eb6c5796758 100644
--- a/packages/osd-optimizer/src/worker/webpack.config.ts
+++ b/packages/osd-optimizer/src/worker/webpack.config.ts
@@ -181,6 +181,7 @@ export function getWebpackConfig(bundle: Bundle, bundleRefs: BundleRefs, worker:
                       outputStyle: 'compressed',
                       includePaths: [Path.resolve(worker.repoRoot, 'node_modules')],
                       sourceMapRoot: `/${bundle.type}:${bundle.id}`,
+                      fiber: require('fibers'),
                     },
                   },
                 },
diff --git a/yarn.lock b/yarn.lock
index 6f378118a6aa..3c613a9c1b73 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7025,6 +7025,11 @@ detect-indent@^5.0.0:
   resolved "https://registry.yarnpkg.com/detect-indent/-/detect-indent-5.0.0.tgz#3871cc0a6a002e8c3e5b3cf7f336264675f06b9d"
   integrity sha1-OHHMCmoALow+Wzz38zYmRnXwa50=
 
+detect-libc@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
+  integrity sha512-pGjwhsmsp4kL2RTz08wcOlGN83otlqHeD/Z5T8GXZB+/YcpQ/dgo+lbU8ZsGxV0HIvqqxo9l7mqYwyYMD9bKDg==
+
 detect-newline@2.X:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/detect-newline/-/detect-newline-2.1.0.tgz#f41f1c10be4b00e87b5f13da680759f2c5bfd3e2"
@@ -8406,6 +8411,13 @@ fetch-mock@^7.3.9:
     path-to-regexp "^2.2.1"
     whatwg-url "^6.5.0"
 
+fibers@^5.0.3:
+  version "5.0.3"
+  resolved "https://registry.yarnpkg.com/fibers/-/fibers-5.0.3.tgz#2fd03acb255db66fe693d15beafbf5ae92193fd7"
+  integrity sha512-/qYTSoZydQkM21qZpGLDLuCq8c+B8KhuCQ1kLPvnRNhxhVbvrpmH9l2+Lblf5neDuEsY4bfT7LeO553TXQDvJw==
+  dependencies:
+    detect-libc "^1.0.3"
+
 figgy-pudding@^3.5.1:
   version "3.5.2"
   resolved "https://registry.yarnpkg.com/figgy-pudding/-/figgy-pudding-3.5.2.tgz#b4eee8148abb01dcf1d1ac34367d59e12fa61d6e"
@@ -14306,9 +14318,9 @@ punycode@^1.2.4, punycode@^1.3.2:
   integrity sha1-wNWmOycYgArY4esPpSachN1BhF4=
 
 qs@6.9.3, qs@^6.10.1, qs@^6.10.3, qs@~6.5.2:
-  version "6.10.3"
-  resolved "https://registry.yarnpkg.com/qs/-/qs-6.10.3.tgz#d6cde1b2ffca87b5aa57889816c5f81535e22e8e"
-  integrity sha512-wr7M2E0OFRfIfJZjKGieI8lBKb7fRCH4Fv5KNPEs7gJ8jadvotdsS08PzOKR7opXhZ/Xkjtt3WF9g38drmyRqQ==
+  version "6.11.0"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.11.0.tgz#fd0d963446f7a65e1367e01abd85429453f0c37a"
+  integrity sha512-MvjoMCJwEarSbUYk5O+nmoSzSutSsTwF85zcHPQ9OrlFoZOYIjaqBAJIqIXjptyD5vThxGq52Xu/MaJzRkIk4Q==
   dependencies:
     side-channel "^1.0.4"