diff --git a/webservice/webservice.py b/webservice/webservice.py
index 0f534e3432d7f90930138b8620060ab475e1e436..8ecdae41b3b3b8a74811568c985ab39130ee2b67 100644
--- a/webservice/webservice.py
+++ b/webservice/webservice.py
@@ -211,7 +211,7 @@ async def run_proc_async(cmd: List[str]) -> (int, bytes):
     Returns the numeric exit code and stdout (bytes)
     """
     proc = await asyncio.create_subprocess_exec(*cmd, stdout=asyncio.subprocess.PIPE)
-    stdout, _ = proc.communicate()
+    stdout, _ = await proc.communicate()
     return proc.returncode, stdout