diff --git a/packages/server/src/jsRunner.ts b/packages/server/src/jsRunner.ts
index 08816aad42..5d3face3d8 100644
--- a/packages/server/src/jsRunner.ts
+++ b/packages/server/src/jsRunner.ts
@@ -33,6 +33,15 @@ export function init() {
         }
       }
 
+      const global = bbCtx.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
+          continue
+        }
+        global.setSync(key, new ivm.ExternalCopy(value).copyInto())
+      }
+
       const script = bbCtx.jsIsolate.compileScriptSync(js)
       return script.runSync(bbCtx.jsContext, {
         timeout: env.JS_PER_EXECUTION_TIME_LIMIT_MS,