diff --git a/build_sysroot/Cargo.lock b/build_sysroot/Cargo.lock
index 44f31b7cd92..15b985eb8b9 100644
--- a/build_sysroot/Cargo.lock
+++ b/build_sysroot/Cargo.lock
@@ -39,12 +39,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "autocfg"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
-
 [[package]]
 name = "cc"
 version = "1.0.59"
@@ -63,9 +57,9 @@ dependencies = [
 
 [[package]]
 name = "compiler_builtins"
-version = "0.1.35"
+version = "0.1.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3fcd8aba10d17504c87ef12d4f62ef404c6a4703d16682a9eb5543e6cf24455"
+checksum = "7cd0782e0a7da7598164153173e5a5d4d9b1da094473c98dce0ff91406112369"
 dependencies = [
  "rustc-std-workspace-core",
 ]
@@ -119,11 +113,10 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.8.2"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e91b62f79061a0bc2e046024cb7ba44b08419ed238ecbd9adbd787434b9e8c25"
+checksum = "00d63df3d41950fb462ed38308eea019113ad1508da725bbedcd0fa5a85ef5f7"
 dependencies = [
- "autocfg",
  "compiler_builtins",
  "rustc-std-workspace-alloc",
  "rustc-std-workspace-core",
@@ -142,9 +135,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.76"
+version = "0.2.77"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "755456fae044e6fa1ebbbd1b3e902ae19e73097ed4ed87bb79934a867c007bc3"
+checksum = "f2f96b10ec2560088a8e76961b00d47107b3a625fecb76dedb29ee7ccbf98235"
 dependencies = [
  "rustc-std-workspace-core",
 ]
diff --git a/rust-toolchain b/rust-toolchain
index 50cc166fc47..a4fe30c9240 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-nightly-2020-09-07
+nightly-2020-09-14