diff --git a/grpc/tasks.py b/grpc/tasks.py
index 69a1c4b..8ac66aa 100644
--- a/grpc/tasks.py
+++ b/grpc/tasks.py
@@ -37,7 +37,10 @@ def gen(c, target="types"):
 
     if target == "ts":
         plugin_path = npmbin_path / ("protoc-gen-ts_proto" + (".cmd" if platform.system() == "Windows" else ""))
-        cmd = "protoc --plugin=protoc-gen-ts_proto={} --ts_proto_opt=outputServices=grpc-js --ts_proto_out={} -I pb {}".format(
+        cmd = "protoc --plugin=protoc-gen-ts_proto={} " \
+              "--ts_proto_opt=outputServices=grpc-js " \
+              "--ts_proto_opt=esModuleInterop=true " \
+              "--ts_proto_out={} -I pb {}".format(
             plugin_path, out_dir, "./pb/bdware/bdledger/api/*.proto")
         print(cmd)
         c.run(cmd)