diff --git a/src/_bcrypt/Cargo.lock b/src/_bcrypt/Cargo.lock
index 404be82..925f54d 100644
--- a/src/_bcrypt/Cargo.lock
+++ b/src/_bcrypt/Cargo.lock
@@ -188,9 +188,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.134"
+version = "0.2.155"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "329c933548736bc49fd575ee68c89e8be4d260064184389a5b77517cddd99ffb"
+checksum = "97b3888a4aecf77e811145cadf6eef5901f4782c53886191b2f693f24761847c"
 
 [[package]]
 name = "lock_api"
