diff --git a/extern/filecoin-ffi b/extern/filecoin-ffi
index dd1c85aba..4b939fe19 160000
--- a/extern/filecoin-ffi
+++ b/extern/filecoin-ffi
@@ -1 +1 @@
-Subproject commit dd1c85ababbbc48d6a0458d8378c16a5d30fddb7
+Subproject commit 4b939fe19424ecc7f621cc1959ac4ba6bd422065