diff --git a/build_sysroot/Cargo.lock b/build_sysroot/Cargo.lock
index 518c6ff3b3b..bcf692f1dc6 100644
--- a/build_sysroot/Cargo.lock
+++ b/build_sysroot/Cargo.lock
@@ -132,9 +132,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.95"
+version = "0.2.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "789da6d93f1b866ffe175afc5322a4d76c038605a1c3319bb57b06967ca98a36"
+checksum = "12b8adadd720df158f4d70dfe7ccc6adb0472d7c55ca83445f6a5ab3e36f8fb6"
 dependencies = [
  "rustc-std-workspace-core",
 ]
diff --git a/rust-toolchain b/rust-toolchain
index 92de398cc8b..6cb05bef6d3 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2021-06-08"
+channel = "nightly-2021-06-17"
 components = ["rust-src", "rustc-dev", "llvm-tools-preview"]