diff --git a/Cargo.lock b/Cargo.lock
index ee1476918575..731ace4f04dd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3861,9 +3861,9 @@ checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
 [[package]]
 name = "libc"
-version = "0.2.81"
+version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1482821306169ec4d07f6aca392a4681f66c75c9918aa49641a2595db64053cb"
+checksum = "03b07a082330a35e43f63177cc01689da34fbffa0105e1246cf0311472cac73a"
 
 [[package]]
 name = "libfuzzer-sys"
diff --git a/client/diem-dev/Cargo.toml b/client/diem-dev/Cargo.toml
index 10b610611857..53a4e57eb1af 100644
--- a/client/diem-dev/Cargo.toml
+++ b/client/diem-dev/Cargo.toml
@@ -10,7 +10,7 @@ publish = false
 edition = "2018"
 
 [dependencies]
-libc = "0.2.81"
+libc = "0.2.88"
 static_assertions = "1.1.0"
 
 bcs = "0.1.2"