diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 54a082f..233ff31 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     name: Rust ${{ matrix.rust }}
     strategy:
       matrix:
-        rust: [ "stable", "1.56", "nightly" ]
+        rust: [ "stable", "1.57", "nightly" ]
         include:
           - rust: nightly
             extra_args: "--features nightly --benches"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0f46c41..0e8cbea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ Each release is tagged in Git and on the Docker repository
 *   [#219](https://github.com/scottlamb/moonfire-nvr/issues/219): fix
     live stream failing with `ws close: 1006` on URLs with port numbers.
 *   build Docker images with link-time optimization.
+*   bump minimum Rust version to 1.57.
 
 ## 0.7.4 (2022-04-13)
 
diff --git a/guide/build.md b/guide/build.md
index de34a48..0e6cae0 100644
--- a/guide/build.md
+++ b/guide/build.md
@@ -207,7 +207,7 @@ following command:
 $ brew install node
 ```
 
-Next, you need Rust 1.56+ and Cargo. The easiest way to install them is by
+Next, you need Rust 1.57+ and Cargo. The easiest way to install them is by
 following the instructions at [rustup.rs](https://www.rustup.rs/). Avoid
 your Linux distribution's Rust packages, which tend to be too old.
 (At least on Debian-based systems; Arch and Gentoo might be okay.)
diff --git a/server/Cargo.toml b/server/Cargo.toml
index 8c54559..21552ee 100644
--- a/server/Cargo.toml
+++ b/server/Cargo.toml
@@ -5,6 +5,7 @@ authors = ["Scott Lamb <slamb@slamb.org>"]
 edition = "2018"
 resolver = "2"
 license-file = "../LICENSE.txt"
+rust-version = "1.57"
 
 [features]