diff --git a/lib/cpp-subprocess b/lib/cpp-subprocess
index 05c76a5..6931e3d 160000
--- a/lib/cpp-subprocess
+++ b/lib/cpp-subprocess
@@ -1 +1 @@
-Subproject commit 05c76a531180298a8404bdf5fccb71137c62cd76
+Subproject commit 6931e3d69fb36e6eae099585646e54ac644bf99c