diff --git a/package.json b/package.json
index 2002a5b36f193..58aedd6473d14 100644
--- a/package.json
+++ b/package.json
@@ -1017,7 +1017,7 @@
     "@langchain/langgraph": "0.0.34",
     "@langchain/openai": "^0.1.3",
     "@langtrase/trace-attributes": "^3.0.8",
-    "@launchdarkly/node-server-sdk": "^9.6.1",
+    "@launchdarkly/node-server-sdk": "^9.7.0",
     "@launchdarkly/openfeature-node-server": "^1.0.0",
     "@loaders.gl/core": "^3.4.7",
     "@loaders.gl/json": "^3.4.7",
@@ -1160,7 +1160,7 @@
     "kea": "^2.6.0",
     "langchain": "^0.2.11",
     "langsmith": "^0.1.55",
-    "launchdarkly-js-client-sdk": "^3.4.0",
+    "launchdarkly-js-client-sdk": "^3.5.0",
     "load-json-file": "^6.2.0",
     "lodash": "^4.17.21",
     "lru-cache": "^4.1.5",
diff --git a/packages/kbn-optimizer/src/worker/webpack.config.ts b/packages/kbn-optimizer/src/worker/webpack.config.ts
index 96a17a6ae7229..b5da9566878e1 100644
--- a/packages/kbn-optimizer/src/worker/webpack.config.ts
+++ b/packages/kbn-optimizer/src/worker/webpack.config.ts
@@ -280,6 +280,14 @@ export function getWebpackConfig(
             plugins: ['@babel/plugin-transform-logical-assignment-operators'],
           },
         },
+        {
+          test: /node_modules[\/\\]launchdarkly[^\/\\]+[\/\\].*.js$/,
+          loaders: 'babel-loader',
+          options: {
+            envName: worker.dist ? 'production' : 'development',
+            presets: [BABEL_PRESET],
+          },
+        },
         {
           test: /\.(html|md|txt|tmpl)$/,
           use: {
diff --git a/yarn.lock b/yarn.lock
index 7dfd74f277527..e725eedf67084 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7425,7 +7425,7 @@
     "@launchdarkly/js-sdk-common" "2.11.0"
     semver "7.5.4"
 
-"@launchdarkly/node-server-sdk@^9.6.1":
+"@launchdarkly/node-server-sdk@^9.7.0":
   version "9.7.0"
   resolved "https://registry.yarnpkg.com/@launchdarkly/node-server-sdk/-/node-server-sdk-9.7.0.tgz#87223c2d3ab5fc7186065a0974960c94f73573ad"
   integrity sha512-ABOsjcjH9pFdyG1m5++lhP+ngxfx4GMcIfgTp0iSPncuh0dMxCCWSx831gbhxR9M+f2x4EnsQ9HEdwnmwktb9g==
@@ -22179,18 +22179,18 @@ launchdarkly-eventsource@2.0.3:
   resolved "https://registry.yarnpkg.com/launchdarkly-eventsource/-/launchdarkly-eventsource-2.0.3.tgz#8a7b8da5538153f438f7d452b1c87643d900f984"
   integrity sha512-VhFjppK7jXlcEKaS7bxdoibB5j01NKyeDR7a8XfssdDGNWCTsbF0/5IExSmPi44eDncPhkoPNxlSZhEZvrbD5w==
 
-launchdarkly-js-client-sdk@^3.4.0:
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/launchdarkly-js-client-sdk/-/launchdarkly-js-client-sdk-3.4.0.tgz#5b5959b548edac8a0f368eb40b079d942573d37b"
-  integrity sha512-3v1jKy1RECT0SG/3SGlyRO32vweoNxvWiJuIChRh/Zhk98cHpANuwameXVhwJ4WEDNZJTur73baaKAyatSP46A==
+launchdarkly-js-client-sdk@^3.5.0:
+  version "3.5.0"
+  resolved "https://registry.yarnpkg.com/launchdarkly-js-client-sdk/-/launchdarkly-js-client-sdk-3.5.0.tgz#cb0e3d6fc21e56750aa86fcaf75733d7f510946f"
+  integrity sha512-3dgxC9S8K2ix6qjdArjZGOJPtAytgfQTuE+vWgjWJK7725rpYbuqbHghIFr5B0+WyWyVBYANldjWd1JdtYLwsw==
   dependencies:
     escape-string-regexp "^4.0.0"
-    launchdarkly-js-sdk-common "5.3.0"
+    launchdarkly-js-sdk-common "5.4.0"
 
-launchdarkly-js-sdk-common@5.3.0:
-  version "5.3.0"
-  resolved "https://registry.yarnpkg.com/launchdarkly-js-sdk-common/-/launchdarkly-js-sdk-common-5.3.0.tgz#336a54843f5ba3541632e10014e49dff45d41674"
-  integrity sha512-NI5wFF8qhjtpRb4KelGdnwNIOf/boLlbLiseV7uf1jxSeoM/L30DAz87RT8VhYCSGCo4LedGILQFednI/MKFkA==
+launchdarkly-js-sdk-common@5.4.0:
+  version "5.4.0"
+  resolved "https://registry.yarnpkg.com/launchdarkly-js-sdk-common/-/launchdarkly-js-sdk-common-5.4.0.tgz#c9787daebe0b583b01d2334218524ea142c85001"
+  integrity sha512-Kb3SDcB6S0HUpFNBZgtEt0YUV/fVkyg+gODfaOCJQ0Y0ApxLKNmmJBZOrPE2qIdzw536u4BqEjtaJdqJWCEElg==
   dependencies:
     base64-js "^1.3.0"
     fast-deep-equal "^2.0.1"