diff --git a/packages/test/src/mocks/workflows-with-node-dependencies/example/client.ts b/packages/test/src/mocks/workflows-with-node-dependencies/example/client.ts
index a066e2c34..9f1604a2d 100644
--- a/packages/test/src/mocks/workflows-with-node-dependencies/example/client.ts
+++ b/packages/test/src/mocks/workflows-with-node-dependencies/example/client.ts
@@ -1,7 +1,10 @@
 import dns from 'dns';
+import http from 'node:http';
 
 export function exampleHeavyweightFunction(): void {
+  // Dummy code, only to ensure dependencies on 'dns' and 'node:http' do not get removed.
+  // This code will actually never run.
   dns.resolve('localhost', () => {
-    /* ignore */
+    http.get('localhost');
   });
 }
diff --git a/packages/test/src/test-bundler.ts b/packages/test/src/test-bundler.ts
index 33d6094f7..70fdccfaf 100644
--- a/packages/test/src/test-bundler.ts
+++ b/packages/test/src/test-bundler.ts
@@ -61,7 +61,7 @@ if (RUN_INTEGRATION_TESTS) {
     const taskQueue = `${t.title}-${uuid4()}`;
     const workflowBundle = await bundleWorkflowCode({
       workflowsPath: require.resolve('./mocks/workflows-with-node-dependencies/issue-516'),
-      ignoreModules: ['dns'],
+      ignoreModules: ['dns', 'http'],
     });
     const worker = await Worker.create({
       taskQueue,
diff --git a/packages/worker/src/workflow/bundler.ts b/packages/worker/src/workflow/bundler.ts
index 8492e5241..d5c957f19 100644
--- a/packages/worker/src/workflow/bundler.ts
+++ b/packages/worker/src/workflow/bundler.ts
@@ -68,7 +68,7 @@ export class WorkflowCodeBundler {
     this.payloadConverterPath = payloadConverterPath;
     this.failureConverterPath = failureConverterPath;
     this.workflowInterceptorModules = workflowInterceptorModules ?? defaultWorflowInterceptorModules;
-    this.ignoreModules = ignoreModules ?? [];
+    this.ignoreModules = (ignoreModules ?? []).map((x) => (x.startsWith('node:') ? x.substring('node:'.length) : x));
     this.webpackConfigHook = webpackConfigHook ?? ((config) => config);
   }
 
@@ -183,14 +183,20 @@ exports.importInterceptors = function importInterceptors() {
     entry: string,
     distDir: string
   ): Promise<string> {
-    const captureProblematicModules: Configuration['externals'] = async (data, _callback): Promise<undefined> => {
-      // Ignore the "node:" prefix if any.
-      const module: string = data.request?.startsWith('node:')
-        ? data.request.slice('node:'.length)
-        : data.request ?? '';
-
-      if (moduleMatches(module, disallowedModules) && !moduleMatches(module, this.ignoreModules)) {
-        this.foundProblematicModules.add(module);
+    const captureProblematicModules: Configuration['externals'] = async (
+      data,
+      _callback
+    ): Promise<string | undefined> => {
+      const hasNodePrefix = data.request?.startsWith('node:');
+      const module: string = (hasNodePrefix ? data.request?.slice('node:'.length) : data.request) ?? '';
+      if (hasNodePrefix || moduleMatches(module, disallowedModules) || moduleMatches(module, this.ignoreModules)) {
+        if (!moduleMatches(module, this.ignoreModules)) {
+          this.foundProblematicModules.add(module);
+        }
+
+        // Tell webpack to replace that module by an empty object.
+        // This is functionnally equivalent to `alias: { 'some-module': false }`, but `externals` is called much more early
+        return 'var {}';
       }
 
       return undefined;
@@ -204,7 +210,6 @@ exports.importInterceptors = function importInterceptors() {
         alias: {
           __temporal_custom_payload_converter$: this.payloadConverterPath ?? false,
           __temporal_custom_failure_converter$: this.failureConverterPath ?? false,
-          ...Object.fromEntries([...this.ignoreModules, ...disallowedModules].map((m) => [m, false])),
         },
       },
       externals: captureProblematicModules,