diff --git a/docs/cargo.md b/docs/cargo.md
index 5e5d699650..f8b24d3fe9 100644
--- a/docs/cargo.md
+++ b/docs/cargo.md
@@ -32,7 +32,7 @@ A rule for bootstrapping a Rust binary using [Cargo](https://doc.rust-lang.org/c
 | <a id="cargo_bootstrap_repository-repo_mapping"></a>repo_mapping |  A dictionary from local repository name to global repository name. This allows controls over workspace dependency resolution for dependencies of this repository.&lt;p&gt;For example, an entry <code>"@foo": "@bar"</code> declares that, for any time this repository depends on <code>@foo</code> (such as a dependency on <code>@foo//some:target</code>, it should actually resolve that dependency within globally-declared <code>@bar</code> (<code>@bar//some:target</code>).   | <a href="https://bazel.build/docs/skylark/lib/dict.html">Dictionary: String -> String</a> | required |  |
 | <a id="cargo_bootstrap_repository-rust_toolchain_repository_template"></a>rust_toolchain_repository_template |  The template to use for finding the host <code>rust_toolchain</code> repository. <code>{version}</code> (eg. '1.53.0'), <code>{triple}</code> (eg. 'x86_64-unknown-linux-gnu'), <code>{system}</code> (eg. 'darwin'), and <code>{arch}</code> (eg. 'aarch64') will be replaced in the string if present.   | String | optional | "rust_{system}_{arch}" |
 | <a id="cargo_bootstrap_repository-srcs"></a>srcs |  Souces to crate to build.   | <a href="https://bazel.build/docs/build-ref.html#labels">List of labels</a> | required |  |
-| <a id="cargo_bootstrap_repository-version"></a>version |  The version of cargo the resolver should use   | String | optional | "1.54.0" |
+| <a id="cargo_bootstrap_repository-version"></a>version |  The version of cargo the resolver should use   | String | optional | "1.55.0" |
 
 
 <a id="#cargo_build_script"></a>
diff --git a/docs/crate_universe.md b/docs/crate_universe.md
index ee50539564..a437b064e6 100644
--- a/docs/crate_universe.md
+++ b/docs/crate_universe.md
@@ -160,7 +160,7 @@ Environment Variables:
 | <a id="crate_universe-rust_toolchain_repository_template"></a>rust_toolchain_repository_template |  The template to use for finding the host <code>rust_toolchain</code> repository. <code>{version}</code> (eg. '1.53.0'), <code>{triple}</code> (eg. 'x86_64-unknown-linux-gnu'), <code>{system}</code> (eg. 'darwin'), and <code>{arch}</code> (eg. 'aarch64') will be replaced in the string if present.   | String | optional | "rust_{system}_{arch}" |
 | <a id="crate_universe-sha256s"></a>sha256s |  The sha256 checksum of the desired rust artifacts   | <a href="https://bazel.build/docs/skylark/lib/dict.html">Dictionary: String -> String</a> | optional | {} |
 | <a id="crate_universe-supported_targets"></a>supported_targets |  A list of supported [platform triples](https://doc.rust-lang.org/nightly/rustc/platform-support.html) to consider when resoliving dependencies.   | List of strings | optional | ["aarch64-apple-darwin", "aarch64-unknown-linux-gnu", "x86_64-apple-darwin", "x86_64-pc-windows-msvc", "x86_64-unknown-freebsd", "x86_64-unknown-linux-gnu"] |
-| <a id="crate_universe-version"></a>version |  The version of cargo the resolver should use   | String | optional | "1.54.0" |
+| <a id="crate_universe-version"></a>version |  The version of cargo the resolver should use   | String | optional | "1.55.0" |
 
 
 <a id="#crate.spec"></a>
diff --git a/docs/flatten.md b/docs/flatten.md
index aeccec2467..b7334facaa 100644
--- a/docs/flatten.md
+++ b/docs/flatten.md
@@ -75,7 +75,7 @@ A rule for bootstrapping a Rust binary using [Cargo](https://doc.rust-lang.org/c
 | <a id="cargo_bootstrap_repository-repo_mapping"></a>repo_mapping |  A dictionary from local repository name to global repository name. This allows controls over workspace dependency resolution for dependencies of this repository.&lt;p&gt;For example, an entry <code>"@foo": "@bar"</code> declares that, for any time this repository depends on <code>@foo</code> (such as a dependency on <code>@foo//some:target</code>, it should actually resolve that dependency within globally-declared <code>@bar</code> (<code>@bar//some:target</code>).   | <a href="https://bazel.build/docs/skylark/lib/dict.html">Dictionary: String -> String</a> | required |  |
 | <a id="cargo_bootstrap_repository-rust_toolchain_repository_template"></a>rust_toolchain_repository_template |  The template to use for finding the host <code>rust_toolchain</code> repository. <code>{version}</code> (eg. '1.53.0'), <code>{triple}</code> (eg. 'x86_64-unknown-linux-gnu'), <code>{system}</code> (eg. 'darwin'), and <code>{arch}</code> (eg. 'aarch64') will be replaced in the string if present.   | String | optional | "rust_{system}_{arch}" |
 | <a id="cargo_bootstrap_repository-srcs"></a>srcs |  Souces to crate to build.   | <a href="https://bazel.build/docs/build-ref.html#labels">List of labels</a> | required |  |
-| <a id="cargo_bootstrap_repository-version"></a>version |  The version of cargo the resolver should use   | String | optional | "1.54.0" |
+| <a id="cargo_bootstrap_repository-version"></a>version |  The version of cargo the resolver should use   | String | optional | "1.55.0" |
 
 
 <a id="#crate_universe"></a>
@@ -119,7 +119,7 @@ Environment Variables:
 | <a id="crate_universe-rust_toolchain_repository_template"></a>rust_toolchain_repository_template |  The template to use for finding the host <code>rust_toolchain</code> repository. <code>{version}</code> (eg. '1.53.0'), <code>{triple}</code> (eg. 'x86_64-unknown-linux-gnu'), <code>{system}</code> (eg. 'darwin'), and <code>{arch}</code> (eg. 'aarch64') will be replaced in the string if present.   | String | optional | "rust_{system}_{arch}" |
 | <a id="crate_universe-sha256s"></a>sha256s |  The sha256 checksum of the desired rust artifacts   | <a href="https://bazel.build/docs/skylark/lib/dict.html">Dictionary: String -> String</a> | optional | {} |
 | <a id="crate_universe-supported_targets"></a>supported_targets |  A list of supported [platform triples](https://doc.rust-lang.org/nightly/rustc/platform-support.html) to consider when resoliving dependencies.   | List of strings | optional | ["aarch64-apple-darwin", "aarch64-unknown-linux-gnu", "x86_64-apple-darwin", "x86_64-pc-windows-msvc", "x86_64-unknown-freebsd", "x86_64-unknown-linux-gnu"] |
-| <a id="crate_universe-version"></a>version |  The version of cargo the resolver should use   | String | optional | "1.54.0" |
+| <a id="crate_universe-version"></a>version |  The version of cargo the resolver should use   | String | optional | "1.55.0" |
 
 
 <a id="#error_format"></a>
@@ -1857,7 +1857,7 @@ See `load_arbitrary_tool` in `@rules_rust//rust:repositories.bzl` for more detai
 
 | Name  | Description | Default Value |
 | :------------- | :------------- | :------------- |
-| <a id="rust_repositories-version"></a>version |  The version of Rust. Either "nightly", "beta", or an exact version. Defaults to a modern version.   |  <code>"1.54.0"</code> |
+| <a id="rust_repositories-version"></a>version |  The version of Rust. Either "nightly", "beta", or an exact version. Defaults to a modern version.   |  <code>"1.55.0"</code> |
 | <a id="rust_repositories-iso_date"></a>iso_date |  The date of the nightly or beta release (ignored if the version is a specific version).   |  <code>None</code> |
 | <a id="rust_repositories-rustfmt_version"></a>rustfmt_version |  The version of rustfmt. Either "nightly", "beta", or an exact version. Defaults to <code>version</code> if not specified.   |  <code>None</code> |
 | <a id="rust_repositories-edition"></a>edition |  The rust edition to be used by default (2015, 2018 (default), or 2021)   |  <code>None</code> |
diff --git a/docs/rust_repositories.md b/docs/rust_repositories.md
index 1f1045c44c..b3471c4b03 100644
--- a/docs/rust_repositories.md
+++ b/docs/rust_repositories.md
@@ -196,7 +196,7 @@ See `load_arbitrary_tool` in `@rules_rust//rust:repositories.bzl` for more detai
 
 | Name  | Description | Default Value |
 | :------------- | :------------- | :------------- |
-| <a id="rust_repositories-version"></a>version |  The version of Rust. Either "nightly", "beta", or an exact version. Defaults to a modern version.   |  <code>"1.54.0"</code> |
+| <a id="rust_repositories-version"></a>version |  The version of Rust. Either "nightly", "beta", or an exact version. Defaults to a modern version.   |  <code>"1.55.0"</code> |
 | <a id="rust_repositories-iso_date"></a>iso_date |  The date of the nightly or beta release (ignored if the version is a specific version).   |  <code>None</code> |
 | <a id="rust_repositories-rustfmt_version"></a>rustfmt_version |  The version of rustfmt. Either "nightly", "beta", or an exact version. Defaults to <code>version</code> if not specified.   |  <code>None</code> |
 | <a id="rust_repositories-edition"></a>edition |  The rust edition to be used by default (2015, 2018 (default), or 2021)   |  <code>None</code> |
diff --git a/rust/known_shas.bzl b/rust/known_shas.bzl
index d438409ed7..e9a2ab31c2 100644
--- a/rust/known_shas.bzl
+++ b/rust/known_shas.bzl
@@ -503,6 +503,64 @@ FILE_KEY_TO_SHA = {
     "2021-06-16/rustfmt-nightly-x86_64-unknown-freebsd": "239953675a43453195e7f6d7a106a3b65baf57230df0bb0ab19fb6839cf99d32",
     "2021-06-16/rustfmt-nightly-x86_64-unknown-linux-gnu": "3edba45a2797a3361e575e7aca34284c5ed8154f8849e3da49b59e45317dc65d",
     "2021-06-16/rustfmt-nightly-x86_64-unknown-linux-musl": "bdeca48139be92c824180e29b790cdb58a4d1e3c15b4c65e9ec93aaae46853aa",
+    "2021-09-08/cargo-nightly-aarch64-apple-darwin": "712aae52f55402ac17ca017dd337ca1aa13f063ecc666fc8c16448f42aa4519d",
+    "2021-09-08/cargo-nightly-aarch64-unknown-linux-gnu": "814ee506cce957c7371bff4961fcb97cc6ee7fc2da4189175be61a4990130824",
+    "2021-09-08/cargo-nightly-aarch64-unknown-linux-musl": "65edd1914dc1f7118f70a722cd7f555bd7e9afc8a1ebb447036ef8948d842742",
+    "2021-09-08/cargo-nightly-x86_64-apple-darwin": "2c539e3a02521842316202cabd37ac580e5d95ee48531435e49628d34217a8cb",
+    "2021-09-08/cargo-nightly-x86_64-pc-windows-msvc": "64c3ab2850c4039c58288cbc402243914eee40d35218665e6a02c8b45efe7704",
+    "2021-09-08/cargo-nightly-x86_64-unknown-freebsd": "c119dd05ee04dc1a0bb414f30036cce9dfb0456eb974bc991acc51122528dd7a",
+    "2021-09-08/cargo-nightly-x86_64-unknown-linux-gnu": "0382a83f1a93228e8fc2c68e396032f61bb431a73aecee75d461b2008c68a33f",
+    "2021-09-08/cargo-nightly-x86_64-unknown-linux-musl": "bfb2a9ea032c591f1c9c36cd2590427c684ebc95b573d919d477b6bd57d5bd37",
+    "2021-09-08/clippy-nightly-aarch64-apple-darwin": "7dade8377af304261199dadf7126afe0e5e50173a89e805567f9d833be59c37c",
+    "2021-09-08/clippy-nightly-aarch64-unknown-linux-gnu": "e36dce42b32982a550a0a575fe827e16e2ba6a53fc850a99f55d8319031625a5",
+    "2021-09-08/clippy-nightly-aarch64-unknown-linux-musl": "abce5645da1c5eeaa193d986f76531e5a3031210e3d94b66d32deba6f15943f6",
+    "2021-09-08/clippy-nightly-x86_64-apple-darwin": "5064e135a17afa8540b6073fda18f686c5bc6903e800ce2f508cf33f74b5b701",
+    "2021-09-08/clippy-nightly-x86_64-pc-windows-msvc": "b7a6dda0b9da65fd964c01ddf16a7b5a309673ad50095bd2c6efe4f62371a075",
+    "2021-09-08/clippy-nightly-x86_64-unknown-freebsd": "8846077e6bd3f96b87b0f341566d51108e4835f23c639e3d95fdb58d31d12033",
+    "2021-09-08/clippy-nightly-x86_64-unknown-linux-gnu": "577ba7ef53a84c296ef1244200af68523708e2ec0884f7e2f7978dae320cb661",
+    "2021-09-08/clippy-nightly-x86_64-unknown-linux-musl": "28365e89efffcd0cbbb7da8d922ebe5c07b2f991fef2c1d845f9f7cdbb014d45",
+    "2021-09-08/llvm-tools-nightly-aarch64-apple-darwin": "dbffc97784c96ba75d6da460d965bd705c7bee737f1d73a0bccf815cc046260a",
+    "2021-09-08/llvm-tools-nightly-aarch64-unknown-linux-gnu": "bc789aa0b012259baa8b5540aee96f1074d9ad6368a5031b556093da61fcd8d7",
+    "2021-09-08/llvm-tools-nightly-aarch64-unknown-linux-musl": "ed3019654dec2aa14233b9fe1a6c934d913acfd798725591ff02d97e10504be6",
+    "2021-09-08/llvm-tools-nightly-x86_64-apple-darwin": "b419d08a367fe4366202106161fa1ccc4dfead9639e582b36c71c3405dc58e8f",
+    "2021-09-08/llvm-tools-nightly-x86_64-pc-windows-msvc": "213cfa58059ba87e650acb240f6b1f9ed6948687fe12a236b16d0abe3e293fbe",
+    "2021-09-08/llvm-tools-nightly-x86_64-unknown-freebsd": "cef580a6e8efcea89bbf40de422e04c36546462ef9e90727da7e339bc9acb83c",
+    "2021-09-08/llvm-tools-nightly-x86_64-unknown-linux-gnu": "4a5ff52134c2dab1746c9d3d84bac92b5ea4fbbb4067c83ae20524eaf060e6db",
+    "2021-09-08/llvm-tools-nightly-x86_64-unknown-linux-musl": "f20f89d4f5c49e57c950770b9b83581534b9f64187f718b8392ff58559b72de0",
+    "2021-09-08/rust-nightly-aarch64-apple-darwin": "67f875cbaeb23dd0aabcedd0c80809cbe9d0799f6316a0b37353d16921f3319e",
+    "2021-09-08/rust-nightly-aarch64-unknown-linux-gnu": "e27d7a5cdb7076674d885ce034ae243fa77f7d1210c83d52c8f8e4c4be86d204",
+    "2021-09-08/rust-nightly-aarch64-unknown-linux-musl": "c4b9090ec6793d96443ba51b0e531d99e7dfe715e2a506e28aa8e070c4811050",
+    "2021-09-08/rust-nightly-x86_64-apple-darwin": "50e5552ae8c20b056b122d2bbc45030f10772498b3bf88b6c539c9bab9e4555c",
+    "2021-09-08/rust-nightly-x86_64-pc-windows-msvc": "2ba241a6982360ffabbc383f91a642dc42c59770253041d8634255543a84d5d3",
+    "2021-09-08/rust-nightly-x86_64-unknown-freebsd": "da6ceabe8dbbd1f92e0dc77a4a98ff1745bb21ea714d9f4eac090626d5a480d0",
+    "2021-09-08/rust-nightly-x86_64-unknown-linux-gnu": "ea4960a18a13815736fcfa33886fa9de8f07ee758339050ce676ef81e9cc0f0d",
+    "2021-09-08/rust-nightly-x86_64-unknown-linux-musl": "acdbb72ee7e579940df739755ac478e3a386431aa606a9ab08ad1c870a24794b",
+    "2021-09-08/rust-std-nightly-aarch64-apple-darwin": "8a08b1862d2e69d249d67fb5669983ae961bd07b9bfc80585ef84269380a317f",
+    "2021-09-08/rust-std-nightly-aarch64-unknown-linux-gnu": "0f2fafb6f4c4693380b3e8eaf4a08729b511cdb1f89c4976c2944b4f87e48b66",
+    "2021-09-08/rust-std-nightly-aarch64-unknown-linux-musl": "4b2c1b78637bb0ddb7f5e2ae16119f84e00f16e874955c34dd3684e67344ac99",
+    "2021-09-08/rust-std-nightly-wasm32-unknown-unknown": "ef19646fb38abfde637fbd619c4cc4b52826fce09074f427d3cdd7d5bbf89167",
+    "2021-09-08/rust-std-nightly-wasm32-wasi": "df7cf483b11358850a2f0f9d6816b8ebcf3813ff4c0cc75cc99171200b2f866a",
+    "2021-09-08/rust-std-nightly-x86_64-apple-darwin": "4d13a115d70efc84daa181bf7927b4531c5e40cfc1df8a99c04c9ebb4010b829",
+    "2021-09-08/rust-std-nightly-x86_64-pc-windows-msvc": "0c93f9734b776bf7c2e150fedc2811db108e732a4f3328aedb038969b435c071",
+    "2021-09-08/rust-std-nightly-x86_64-unknown-freebsd": "64ff9746ede66362f44aa5de62541a85a196e639a2cfb5d60be038579ddcd367",
+    "2021-09-08/rust-std-nightly-x86_64-unknown-linux-gnu": "b6d1ff428b1c0591ea7375f6ae3421630d4b6da7e8cb6bad071284b5d563abe8",
+    "2021-09-08/rust-std-nightly-x86_64-unknown-linux-musl": "1cb7c1f28e4fa5096aaea77e56006a1cee69b77c5fcb1fae993a961942ea16d0",
+    "2021-09-08/rustc-nightly-aarch64-apple-darwin": "4de0dde4a4499074c9c4ca3a9617c89376ccbc21429ce2af94147570844f5436",
+    "2021-09-08/rustc-nightly-aarch64-unknown-linux-gnu": "a34ca09afb230c0852b1765f4477ff1135f66cb4c41fe88ca79901c3adf30aca",
+    "2021-09-08/rustc-nightly-aarch64-unknown-linux-musl": "9594f62bd1e209725302318f372ea2c28cbd83ec2b29c60e5db933f60674b447",
+    "2021-09-08/rustc-nightly-x86_64-apple-darwin": "1a7eccf24dd1baecbe07c2999c917e54e7f213496a2ed542fc8ba5afbb43d1f2",
+    "2021-09-08/rustc-nightly-x86_64-pc-windows-msvc": "15667c4fe1d810b3b1979c19d1def41dc5484f7444517c4277aec2154404face",
+    "2021-09-08/rustc-nightly-x86_64-unknown-freebsd": "13b46879f9eb1a5c467458ab1eb3a65d295d9834f3fec42f0ad4a273d9fde926",
+    "2021-09-08/rustc-nightly-x86_64-unknown-linux-gnu": "73891cf0b7eb252b6b8486ddaad91f7ce4b18950befe7853bc3d20d38e5ae069",
+    "2021-09-08/rustc-nightly-x86_64-unknown-linux-musl": "ba94c257e93dab13beaf0a78168de64295ee0178fe76a8be10e18c5fb5d7c5fb",
+    "2021-09-08/rustfmt-nightly-aarch64-apple-darwin": "691922fb32f3da37532bb9be974ad1717af521ec2b71bca4bbb5e57f3c4cc3fa",
+    "2021-09-08/rustfmt-nightly-aarch64-unknown-linux-gnu": "98b2eaf259a1bfdc70e40a52e891920dec7fc6132ad8d2420f91655c793ea340",
+    "2021-09-08/rustfmt-nightly-aarch64-unknown-linux-musl": "a4df0726fba466a5180471d3e63735c2b5ee9794e9f42026b1e8ae404dd43ab6",
+    "2021-09-08/rustfmt-nightly-x86_64-apple-darwin": "20de8ad3aa7507dd9657c4a4b959c38cc7f732a87bb757183033f78a96288e45",
+    "2021-09-08/rustfmt-nightly-x86_64-pc-windows-msvc": "0cc0f10763b73c5e4c8bdcd15a563d7e9d705b192ed6e8edc50dd6a71b874761",
+    "2021-09-08/rustfmt-nightly-x86_64-unknown-freebsd": "e1c28472a81312560ca36719f0b61b7212a07d63e85d745f97cd8e3b9ea8f191",
+    "2021-09-08/rustfmt-nightly-x86_64-unknown-linux-gnu": "a7d579672b94978e8427584f7e9d2b6534f320719252db46fc6ee85082d646ff",
+    "2021-09-08/rustfmt-nightly-x86_64-unknown-linux-musl": "fba0e7bc1401b830223b5207b63808e28403f48d1591c7d47c1681519c1883f7",
     "cargo-1.48.0-aarch64-unknown-linux-gnu": "71347016f0da96d4250225f7b52701274df958870b1a65482badb87d661035f9",
     "cargo-1.48.0-aarch64-unknown-linux-musl": "873883a9f6eb2e0cae7dafdc6c4262157298b7bc6ac5c3ed899ed1f55cad7e82",
     "cargo-1.48.0-x86_64-apple-darwin": "ce00d796cf5a9ac8d88d9df94c408e5d7ccd3541932a829eae833cc8e57efb15",
@@ -566,6 +624,14 @@ FILE_KEY_TO_SHA = {
     "cargo-1.54.0-x86_64-unknown-freebsd": "3a2612b2073f5d3b45a4c88f359a8f5e2b86b85f7ef68bda518f532339f01227",
     "cargo-1.54.0-x86_64-unknown-linux-gnu": "8c4f404e6fd3e26a535230d1d47d162d0e4a51a0ff82025ae526b5121bdbf6ad",
     "cargo-1.54.0-x86_64-unknown-linux-musl": "d6e2d8e2075f433b3a607b95ef170a85fc0b44356905111004d23a9b72776b0a",
+    "cargo-1.55.0-aarch64-apple-darwin": "9e49c057f8020fa4f67e6530aa2929c175e5417d19fc9f3a14c9ffb168c2932d",
+    "cargo-1.55.0-aarch64-unknown-linux-gnu": "48bc8751f548b08643fbdea7756ccda35f0762492e95ea41ca41137290f56513",
+    "cargo-1.55.0-aarch64-unknown-linux-musl": "01ac6a21d74ac66a33e58d2d5766c4c90673be0e8385893da4e178a0ded56299",
+    "cargo-1.55.0-x86_64-apple-darwin": "4e004cb231c8efbd4241b012c6abeefc7d61e2b4357cfe69feb0d4a448d30f05",
+    "cargo-1.55.0-x86_64-pc-windows-msvc": "2bc59373437d25e5cb9d4f573fa187078c5a924a244366787ce04106d3972f6e",
+    "cargo-1.55.0-x86_64-unknown-freebsd": "f574b15dee6c52f25076bb657f3e3129b5828a2617c82f2e1c4101e0bd21a880",
+    "cargo-1.55.0-x86_64-unknown-linux-gnu": "bb18c74aea07fa29c7169ce78756dfd08c07da08c584874e09fa6929c8267ec1",
+    "cargo-1.55.0-x86_64-unknown-linux-musl": "d91efc8e7a71845dcec9ec7db1edb6765cba5ded69d3ab734f549d6875b52e97",
     "clippy-1.48.0-aarch64-unknown-linux-gnu": "2cc894bf75d938c0f7b96c7711d93b6d5a0befed5c09232cdd8413a57942ed88",
     "clippy-1.48.0-aarch64-unknown-linux-musl": "b3d740358470df6f4c1881a40db16c6fce4082bd251b012963147fdadab96879",
     "clippy-1.48.0-x86_64-apple-darwin": "d70a5d224a90df3fc77d7bd38df931023a3966be755b888bf0888d6bfcbdc424",
@@ -629,6 +695,14 @@ FILE_KEY_TO_SHA = {
     "clippy-1.54.0-x86_64-unknown-freebsd": "92569c0f9faab4501d47ab6958d6535d2039490e763cc65c1700b0c5436106b0",
     "clippy-1.54.0-x86_64-unknown-linux-gnu": "4896d754064c781611901c459d326dfcc10d9916cad5c1dd6a0898bca7e6428e",
     "clippy-1.54.0-x86_64-unknown-linux-musl": "8184892daa7b652af96c9634ad15f33e97b022c7aad16e1e95bb95bf3fa96972",
+    "clippy-1.55.0-aarch64-apple-darwin": "470c8c99050a7785c4b261ab95575141bb48f19dc135dec96b8424e175898670",
+    "clippy-1.55.0-aarch64-unknown-linux-gnu": "ace2cface85e199c5d1773a88ca5ba4d1527cf3936bc844113e4defb54fc13b8",
+    "clippy-1.55.0-aarch64-unknown-linux-musl": "f1dead08b21cc8a67a3d27c785e107d2aa5363e60dcfd74c7fb81fd663d288b8",
+    "clippy-1.55.0-x86_64-apple-darwin": "fff5969a2a6795e28e040eda2ab59d29a48ff5aad0f15bea194b61befbffec77",
+    "clippy-1.55.0-x86_64-pc-windows-msvc": "d7dfa77cc50348023d973311bf378181bdf18d5aff7c2fde69cf8031564667da",
+    "clippy-1.55.0-x86_64-unknown-freebsd": "ba035cd7f62468fc75a56f604ac3579adce4f90ba2e6df219299f21668def51f",
+    "clippy-1.55.0-x86_64-unknown-linux-gnu": "108ebbc6b311fc0cafc125f1fd7f35a82935000c60cad49a565958e47f63193f",
+    "clippy-1.55.0-x86_64-unknown-linux-musl": "e248a8b3987c2750439966ed5df385a089147079105d85041a8147b1044b4f3c",
     "llvm-tools-1.36.0-aarch64-unknown-linux-gnu": "942856e49837a1c3b9c7d48b52cf0ac0fcb2bb31bb691fe53bfb934afb561c7f",
     "llvm-tools-1.36.0-x86_64-apple-darwin": "ed702a4174a27fcf118f301e79835c3da205d3d98adb4acc294b72293a2ec790",
     "llvm-tools-1.36.0-x86_64-pc-windows-msvc": "cf72242bcf873227c026505f56f3ffdaa2febde828d67ad7fc04c4a2e72d7587",
@@ -764,6 +838,14 @@ FILE_KEY_TO_SHA = {
     "llvm-tools-1.54.0-x86_64-unknown-freebsd": "024fcaabada32629381b5d1ec856d595eacf5cf506c43619d2ab454aeac7da4c",
     "llvm-tools-1.54.0-x86_64-unknown-linux-gnu": "aa4000bccc5e463c9cc3aecb6b400813a0f122b5f14a747710f23b838b4fbcc8",
     "llvm-tools-1.54.0-x86_64-unknown-linux-musl": "b0e2a74c6e1fb0c9fa888887996cb168c0d119ee4596736a4785b1200b79021b",
+    "llvm-tools-1.55.0-aarch64-apple-darwin": "00a0a90cd743480a192d3f1c905d57b98986d75c88fc738effcbc50c43b0ab85",
+    "llvm-tools-1.55.0-aarch64-unknown-linux-gnu": "259a183333a4f19eded8a2b6fa4382b7f36a9a23605d0f0a7b59a28d794c77d1",
+    "llvm-tools-1.55.0-aarch64-unknown-linux-musl": "a6a6756bb3091d15b772e57189c4279d17e218193b7d795b307effb88d269ef5",
+    "llvm-tools-1.55.0-x86_64-apple-darwin": "fce7354b071f2da56a100f89846e0c5bb3848f2e85e8583102f1d8b409214a95",
+    "llvm-tools-1.55.0-x86_64-pc-windows-msvc": "03307e359512652648b296cecf1e446befbeaf4a3a73db5cec1e6dfbc03f6376",
+    "llvm-tools-1.55.0-x86_64-unknown-freebsd": "f186caf30fadf738275f4daf077815445b4c3496cc7d3e85fbf53b5f8f57eb21",
+    "llvm-tools-1.55.0-x86_64-unknown-linux-gnu": "ebad576075c4dd039444ca7335ff244d6c0c566a7ee1532ac80d36a2de1217a5",
+    "llvm-tools-1.55.0-x86_64-unknown-linux-musl": "28de296a08d173bf5bad236935ccc547c8eb741fb91900cb10499e80e2472ec5",
     "rust-1.26.0-aarch64-unknown-linux-gnu": "e12dc84bdb569cdb382268a5fe6ae6a8e2e53810cb890ec3a7133c20ba8451ac",
     "rust-1.26.0-x86_64-apple-darwin": "38708803c3096b8f101d1919ee2d7e723b0adf1bc1bb986b060973b57d8c7c28",
     "rust-1.26.0-x86_64-pc-windows-msvc": "20631bf942242d4be82363030839851bf18a2199b74a661bdc334f830e9e1d5a",
@@ -990,6 +1072,14 @@ FILE_KEY_TO_SHA = {
     "rust-1.54.0-x86_64-unknown-freebsd": "026a40470b9fddfbb4abff3546e620eceaa2812ffc13e180bbb9360c01501a16",
     "rust-1.54.0-x86_64-unknown-linux-gnu": "350354495b1d4b6dd2ec7cf96aa9bc61d031951cf667a31e8cf401dc508639e6",
     "rust-1.54.0-x86_64-unknown-linux-musl": "3571db0018fcd32f3b579a32b2301826dbd1cce44b373aed8e8a31c2a6f52fe8",
+    "rust-1.55.0-aarch64-apple-darwin": "70c71d30d0de76912fcd88d503a6cb4323cfe6250c1a255be7e0d4e644b3d40a",
+    "rust-1.55.0-aarch64-unknown-linux-gnu": "eebdb2e659ed14884a49f0457d44e5e8c9f89fca3414533752c6dbb96232c156",
+    "rust-1.55.0-aarch64-unknown-linux-musl": "2ce36a7d34f1f2aa43b4cbc0b437d96eefb45743828bf9ae699ff581ae257f28",
+    "rust-1.55.0-x86_64-apple-darwin": "2e345ac7724c192c9487a2c6bd4f6c52c884d791981510288830d27d9a0bf2f3",
+    "rust-1.55.0-x86_64-pc-windows-msvc": "c7f21e819d883306c3a06115b4d46a92c7310aed655a2f19b40c457a6f06ba62",
+    "rust-1.55.0-x86_64-unknown-freebsd": "7ddb8ec4d431f64dd6428df93d46f726516970b0ca83c71c3efbfe34a42d3113",
+    "rust-1.55.0-x86_64-unknown-linux-gnu": "2080253a2ec36ac8ed6e060d30802d888533124b8d16545cfd4af898b365eaac",
+    "rust-1.55.0-x86_64-unknown-linux-musl": "f24f68587253c4bfbe59d3d10fe4897068d9130538de6b2d02097a25718030c2",
     "rust-src-1.26.0": "d02fe6fd5c0f330656e9ff0a290ebf23cab7c909f96ce1838247fadc117eb1dd",
     "rust-src-1.26.1": "19ef8113ae53ec7ea8f6772a5c9ce5a3dfc28b1bddd800841fb5bbec33fa3619",
     "rust-src-1.26.2": "d63cb7ca67f1bb2101898b7ca33105eeb6d9d9cc3e7ff566b90b0321ec448e73",
@@ -1028,6 +1118,7 @@ FILE_KEY_TO_SHA = {
     "rust-src-1.52.1": "34fb417e94aadbace368e934e1f079dd09f2423ccd6cc0cc519cdd55ef3fa8bf",
     "rust-src-1.53.0": "26b1464bd313ae99de27a162ca96b4fb321e4414448ea8ce8abd715ef8c7ba2b",
     "rust-src-1.54.0": "56d14ee97c59c543291154ab427cf96a1a82ef5cf32b89f14886dcfc01f5310b",
+    "rust-src-1.55.0": "3be79e301246b413e9e1cc4b5b4f53bcbc964482005381a899ab6c597bef7996",
     "rust-std-1.26.0-aarch64-unknown-linux-gnu": "a583ddc2d4b5f9516bf136f781268ae0e813295d1d145fab4b46a4220f448923",
     "rust-std-1.26.0-aarch64-unknown-linux-musl": "6a112ecd4cdefee2688bf69fdceb785a4d08cea33ba32296539abe3cb7f5eae1",
     "rust-std-1.26.0-wasm32-unknown-unknown": "0f8bb8bdb523cd05acd11006d47b14d7589e64fe25a43d1aec5df692988b400f",
@@ -1359,6 +1450,16 @@ FILE_KEY_TO_SHA = {
     "rust-std-1.54.0-x86_64-unknown-freebsd": "f504cad489fe606dd1a7d064253d6e0d0e5450674cfd941b8f848953efce99e5",
     "rust-std-1.54.0-x86_64-unknown-linux-gnu": "487c51ac97e7f7deceae904b70e9bb031574dbeefe07b39b24e3fb00740962eb",
     "rust-std-1.54.0-x86_64-unknown-linux-musl": "7cbe73472390e0e63d1812dd86d5024350e0e8dae36a6bf52585ad0136148818",
+    "rust-std-1.55.0-aarch64-apple-darwin": "bd364710331b34f454258b73e5cfc0583d3c0763ecce0994d8a990c1847604a4",
+    "rust-std-1.55.0-aarch64-unknown-linux-gnu": "e30063a259e32cd0e31baadcee82112ef840e0f654d5128dd79fc715ede92058",
+    "rust-std-1.55.0-aarch64-unknown-linux-musl": "f540bf8238b46cefc5490eb6e626f8712ff5a49d8fdb7e75e838a5c1e1b3046d",
+    "rust-std-1.55.0-wasm32-unknown-unknown": "275d7a1032f709d186bb8bd66a96f17f5c8d6c1a4c3b51b7ce60a4f3dccefdf4",
+    "rust-std-1.55.0-wasm32-wasi": "69696faaa29bdffc58a71707a4547a85a09199218411302afa7554073357f576",
+    "rust-std-1.55.0-x86_64-apple-darwin": "8888fb0a1cbc645f86e1551d27cc127697361fecab9cd414691e434976412733",
+    "rust-std-1.55.0-x86_64-pc-windows-msvc": "8507fe0f2059d68bc0cfabae1cc96cfc3d0357f04522942c5d4fdcdc1cbc23a8",
+    "rust-std-1.55.0-x86_64-unknown-freebsd": "522f4f75c50a0fde08d6235ed80c7cac30c922943954aad1e7c154cd8762ddd3",
+    "rust-std-1.55.0-x86_64-unknown-linux-gnu": "c07c5ce96b86364601c0c471bb85105e80a5e345b3e4b3e2674e541cc2fdefcf",
+    "rust-std-1.55.0-x86_64-unknown-linux-musl": "357b8f56ffa3858e2f32be837bd84e3d89403f17c55bf0c105f34a0b796bceed",
     "rustc-1.26.0-aarch64-unknown-linux-gnu": "ddddaddb585b95d81854171ac4e02d07790505853cee3034f199c8b7897f32e2",
     "rustc-1.26.0-x86_64-apple-darwin": "5cb67314656d16cf2a1bdc84213aaaf6afdb5811825c7afba916e2d42d3d641f",
     "rustc-1.26.0-x86_64-pc-windows-msvc": "427ae4a43a901be288ff3a4dc85d3a14f7e95108cfdaae63e8dbb4a227e07cdd",
@@ -1585,6 +1686,14 @@ FILE_KEY_TO_SHA = {
     "rustc-1.54.0-x86_64-unknown-freebsd": "a2974a15b2b284c09eeac39396728544700fdb8689e8b662ee062e68daa0b554",
     "rustc-1.54.0-x86_64-unknown-linux-gnu": "cd4c1c5db3b8ca3f76fac42d209e83640794eb8c2bbfb71b71e5f93b584d159c",
     "rustc-1.54.0-x86_64-unknown-linux-musl": "896b4eb229259005410311a29587aaab4ed7d5d590d810b06abd7601a004a953",
+    "rustc-1.55.0-aarch64-apple-darwin": "4d782c947f1a35f5fb60799f019b4b82ad121a017746c935ab37fbd105c66c8f",
+    "rustc-1.55.0-aarch64-unknown-linux-gnu": "31dbbc1395f5a545c114e778552159713977dec423bca5705bd4c92ee3840cb1",
+    "rustc-1.55.0-aarch64-unknown-linux-musl": "a5170d72af554b1d39a0db46cb2bd55911132705e3cf8e38d16a382f3b9d4215",
+    "rustc-1.55.0-x86_64-apple-darwin": "7d1197687c72d4c72ae04905b96a7205ec4ad7c9da0231ea6f3bbbc8399adb84",
+    "rustc-1.55.0-x86_64-pc-windows-msvc": "2cb681fa074386af8dd2cc6c79b57e1a8048acb1dda18e04fedff1c2dd84d70b",
+    "rustc-1.55.0-x86_64-unknown-freebsd": "ad50ba2c87acb59020959df594aadc207f4fa527b2b2cd8849f3b1d3f666986f",
+    "rustc-1.55.0-x86_64-unknown-linux-gnu": "9da098b2df01124f2c4b9789767151521f4bab98f50befdc75a691cece0c0d00",
+    "rustc-1.55.0-x86_64-unknown-linux-musl": "f7c1fe2393db842630b23ecf6164fac471b11235fdb62a35a86e7cd3cf8d749c",
     "rustfmt-1.48.0-aarch64-unknown-linux-gnu": "28f7d1ef37c034033eb0e30a13e5f0ad5bbc506adb8a8a9c03adce2b0d4842d5",
     "rustfmt-1.48.0-aarch64-unknown-linux-musl": "e6efa0fae347f97dca3b892565302d35b4cedfee7cb6e2b5fcdb2801074fe018",
     "rustfmt-1.48.0-x86_64-apple-darwin": "cfe593a9446e7dfa52ded8a7cca174ba0c2d1cac6e865d04e0890282f25d22e2",
@@ -1648,4 +1757,12 @@ FILE_KEY_TO_SHA = {
     "rustfmt-1.54.0-x86_64-unknown-freebsd": "4b5098c749c547516ca2c81aabf87617d589ae674cdc48d7636b37cc5017d29b",
     "rustfmt-1.54.0-x86_64-unknown-linux-gnu": "0205d6af87d381b93aa69bc75c0bd44ac5eb006832f0f505a851dc8d22aaf101",
     "rustfmt-1.54.0-x86_64-unknown-linux-musl": "34a2321d2f7f57398b6f588f2e219639f0958d444ca283ff0c8d0144d8c09fc1",
+    "rustfmt-1.55.0-aarch64-apple-darwin": "dad1bcea851e509f289178c7bbd8fca5152efd1876450e353cc77fe5fccd2f46",
+    "rustfmt-1.55.0-aarch64-unknown-linux-gnu": "a0a24a0e5618997218cced0632dfe776315225ee394e8412ef5dcf9e21325b9c",
+    "rustfmt-1.55.0-aarch64-unknown-linux-musl": "736208df67d87b3ced05764d52de07470f44502c901c48ab6cc6dfe3cab6046f",
+    "rustfmt-1.55.0-x86_64-apple-darwin": "b38a096a59ecc6309bcbea67ed4e50de6d48cdc124ff5b721bf7e929ef4c4fa7",
+    "rustfmt-1.55.0-x86_64-pc-windows-msvc": "49f58043700b33578963faa22dcb993b5d604d7d8cc852ff53f11138f9a20f35",
+    "rustfmt-1.55.0-x86_64-unknown-freebsd": "5317af05afbcfde0fae7ba4ad5404901b0c611d826c7dd38926a8b08ade53c72",
+    "rustfmt-1.55.0-x86_64-unknown-linux-gnu": "ecb58add71d3f3cf8a213fe7b531bc230f8da5cecd835cee6429e76798b548cc",
+    "rustfmt-1.55.0-x86_64-unknown-linux-musl": "33bd862bbc9b54745c3e1d400440996fd0e6759c4d482f1a888ba8fafab29c3a",
 }
diff --git a/rust/private/common.bzl b/rust/private/common.bzl
index a132fc5f82..7baf10ce94 100644
--- a/rust/private/common.bzl
+++ b/rust/private/common.bzl
@@ -31,7 +31,7 @@ load(":providers.bzl", "CrateInfo", "DepInfo", "StdLibInfo")
 #
 # Note: Code in `.github/workflows/crate_universe.yaml` looks for this line, if
 # you remove it or change its format, you will also need to update that code.
-DEFAULT_RUST_VERSION = "1.54.0"
+DEFAULT_RUST_VERSION = "1.55.0"
 DEFAULT_RUST_EDITION = "2018"
 
 def _create_crate_info(**kwargs):
diff --git a/util/fetch_shas_NIGHTLY_ISO_DATES.txt b/util/fetch_shas_NIGHTLY_ISO_DATES.txt
index 9e8986b5af..9d1b346ea7 100644
--- a/util/fetch_shas_NIGHTLY_ISO_DATES.txt
+++ b/util/fetch_shas_NIGHTLY_ISO_DATES.txt
@@ -5,3 +5,4 @@
 2020-11-10
 2020-12-30
 2021-06-16
+2021-09-08
diff --git a/util/fetch_shas_VERSIONS.txt b/util/fetch_shas_VERSIONS.txt
index 2670677493..bb235fe36e 100644
--- a/util/fetch_shas_VERSIONS.txt
+++ b/util/fetch_shas_VERSIONS.txt
@@ -36,3 +36,4 @@
 1.52.1
 1.53.0
 1.54.0
+1.55.0