diff --git a/mcaptcha-pow-ffi/Cargo.lock b/mcaptcha-pow-ffi/Cargo.lock
index 9d82c4a..1e05f2f 100644
--- a/mcaptcha-pow-ffi/Cargo.lock
+++ b/mcaptcha-pow-ffi/Cargo.lock
@@ -151,9 +151,9 @@ checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
 
 [[package]]
 name = "libc"
-version = "0.2.158"
+version = "0.2.159"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8adc4bb1803a324070e64a98ae98f38934d91957a99cfb3a43dcbc01bc56439"
+checksum = "561d97a539a36e26a9a5fad1ea11a3039a67714694aaa379433e580854bc3dc5"
 
 [[package]]
 name = "mcaptcha-pow-ffi"