diff --git a/prymer/util/executable_runner.py b/prymer/util/executable_runner.py
index e69500c..e2612ba 100644
--- a/prymer/util/executable_runner.py
+++ b/prymer/util/executable_runner.py
@@ -42,7 +42,7 @@ def __init__(
         command: list[str],
         stdin: int = subprocess.PIPE,
         stdout: int = subprocess.PIPE,
-        stderr: int = subprocess.PIPE,
+        stderr: int = subprocess.DEVNULL,
     ) -> None:
         if len(command) == 0:
             raise ValueError(f"Invocation must not be empty, received {command}")