diff --git a/Cargo.lock b/Cargo.lock
index 50c3c6f112d2c..9db0226541b31 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,7 +3,7 @@ name = "libc-test"
 version = "0.1.0"
 dependencies = [
  "ctest 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.20",
+ "libc 0.2.21",
 ]
 
 [[package]]
@@ -48,7 +48,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libc"
-version = "0.2.20"
+version = "0.2.21"
 
 [[package]]
 name = "log"
diff --git a/Cargo.toml b/Cargo.toml
index 084337e0d30fc..ed65b3f5ae23a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 
 name = "libc"
-version = "0.2.20"
+version = "0.2.21"
 authors = ["The Rust Project Developers"]
 license = "MIT/Apache-2.0"
 readme = "README.md"