diff --git a/packages/server/src/jsRunner.ts b/packages/server/src/jsRunner.ts
index abb4091835..179e736fb2 100644
--- a/packages/server/src/jsRunner.ts
+++ b/packages/server/src/jsRunner.ts
@@ -14,18 +14,20 @@ export function init() {
   setJSRunner((js: string, ctx: Record<string, any>) => {
     return tracer.trace("runJS", {}, span => {
       const bbCtx = context.getCurrentContext()!
-      if (!bbCtx.jsIsolate) {
-        bbCtx.jsIsolate = new ivm.Isolate({ memoryLimit: 64 })
-        bbCtx.jsContext = bbCtx.jsIsolate.createContextSync()
-        const helpersModule = bbCtx.jsIsolate.compileModuleSync(helpersSource)
-        helpersModule.instantiateSync(bbCtx.jsContext, specifier => {
-          throw new Error(`No imports allowed. Required: ${specifier}`)
-        })
-      }
+      let { jsContext, jsIsolate } = bbCtx
+      // if (!jsIsolate) {
+      jsIsolate = new ivm.Isolate({ memoryLimit: 64 })
+      jsContext = jsIsolate.createContextSync()
+      const helpersModule = jsIsolate.compileModuleSync(helpersSource)
+
+      helpersModule.instantiateSync(jsContext, specifier => {
+        throw new Error(`No imports allowed. Required: ${specifier}`)
+      })
+      // }
 
       const perRequestLimit = env.JS_PER_REQUEST_TIME_LIMIT_MS
       if (perRequestLimit) {
-        const cpuMs = Number(bbCtx.jsIsolate.cpuTime) / 1e6
+        const cpuMs = Number(jsIsolate.cpuTime) / 1e6
         if (cpuMs > perRequestLimit) {
           throw new Error(
             `CPU time limit exceeded (${cpuMs}ms > ${perRequestLimit}ms)`
@@ -33,19 +35,42 @@ export function init() {
         }
       }
 
-      const global = bbCtx.jsContext!.global
+      const global = jsContext!.global
+
       for (const [key, value] of Object.entries(ctx)) {
-        if (typeof value === "function") {
-          // Can't copy functions into the isolate, so we just ignore them
+        if (key === "helpers") {
+          // Can't copy the native helpers into the isolate. We just ignore them as they are handled properly from the helpersSource
           continue
         }
-        global.setSync(key, new ivm.ExternalCopy(value).copyInto())
+        global.setSync(key, value)
       }
 
-      const script = bbCtx.jsIsolate.compileScriptSync(js)
-      return script.runSync(bbCtx.jsContext!, {
+      const script = jsIsolate.compileModuleSync(
+        `import helpers from "compiled_module";${js};cb(run());`,
+        {}
+      )
+
+      script.instantiateSync(jsContext!, specifier => {
+        if (specifier === "compiled_module") {
+          return helpersModule
+        }
+
+        throw new Error(`"${specifier}" import not allowed`)
+      })
+
+      let result
+      global.setSync(
+        "cb",
+        new ivm.Callback((value: any) => {
+          result = value
+        })
+      )
+
+      script.evaluateSync({
         timeout: env.JS_PER_EXECUTION_TIME_LIMIT_MS,
       })
+
+      return result
     })
   })
 }