diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e35526e1..1dca4d99b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
         container:
           - 'ubuntu:24.04'
           - 'opensuse/tumbleweed:latest'
-          - 'rust:1.89-alpine'
+          - 'rust:1.90-alpine'
         test-qemu:
           - false
         include:
@@ -48,7 +48,7 @@ jobs:
             ignore-format: true
         exclude: # TODO: https://github.com/actions/runner/issues/1637
           - runs-on: ubuntu-24.04-arm
-            container: 'rust:1.89-alpine'
+            container: 'rust:1.90-alpine'
       fail-fast: false
 
     runs-on: ${{ matrix.runs-on }}
@@ -101,7 +101,7 @@ jobs:
         persist-credentials: false
     # This is where we check that we're not using features from a more recent rust version. When
     # updating this, please also update workspace.package.rust-version in `Cargo.toml`.
-    - uses: dtolnay/rust-toolchain@1.89.0
+    - uses: dtolnay/rust-toolchain@1.90.0
       id: rust-toolchain
       with:
         components: clippy
diff --git a/Cargo.toml b/Cargo.toml
index 854d405c2..b8d1863ce 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ repository = "https://github.com/davidlattimore/wild"
 license = "MIT OR Apache-2.0"
 version = "0.5.0"
 readme = "README.md"
-rust-version = "1.89"
+rust-version = "1.90"
 edition = "2024"
 
 [workspace.dependencies]
diff --git a/docker/alpine.Dockerfile b/docker/alpine.Dockerfile
index 66fbe10f0..14df22d08 100644
--- a/docker/alpine.Dockerfile
+++ b/docker/alpine.Dockerfile
@@ -3,7 +3,7 @@
 # docker build --progress=plain -t wild-dev-alpine . -f docker/alpine.Dockerfile
 # docker run -it wild-dev-alpine
 
-FROM rust:1.89-alpine AS chef
+FROM rust:1.90-alpine AS chef
 RUN wget -qO- https://github.com/LukeMathWalker/cargo-chef/releases/download/v0.1.70/cargo-chef-x86_64-unknown-linux-musl.tar.gz | tar -xzf- && \
     mv cargo-chef /usr/local/bin
 RUN rustup toolchain install nightly && \
diff --git a/docker/arch.Dockerfile b/docker/arch.Dockerfile
index de44630d5..36907cc97 100644
--- a/docker/arch.Dockerfile
+++ b/docker/arch.Dockerfile
@@ -45,7 +45,7 @@ RUN wget -qO- https://github.com/LukeMathWalker/cargo-chef/releases/download/v0.
 
 RUN wget https://sh.rustup.rs -O rustup-installer && \
     chmod +x rustup-installer && \
-    ./rustup-installer -y --default-toolchain 1.89.0
+    ./rustup-installer -y --default-toolchain 1.90.0
 
 ENV PATH="/root/.cargo/bin:$PATH"
 
diff --git a/docker/debian.Dockerfile b/docker/debian.Dockerfile
index dcd6a9dc5..d8e71a48a 100644
--- a/docker/debian.Dockerfile
+++ b/docker/debian.Dockerfile
@@ -3,7 +3,7 @@
 # docker build --progress=plain -t wild-dev-debian . -f docker/debian.Dockerfile
 # docker run -it wild-dev-debian
 
-FROM rust:1.89 AS chef
+FROM rust:1.90 AS chef
 RUN apt-get update && \
     apt-get install -y \
         clang \
diff --git a/nix/default.nix b/nix/default.nix
index 5ff04567e..6cb7980ee 100644
--- a/nix/default.nix
+++ b/nix/default.nix
@@ -18,8 +18,8 @@
   glibc,
   lld,
 }:
-assert lib.assertMsg (lib.versionAtLeast pkgs.rustc.version "1.89.0")
-  "Wild requires at least Rust 1.89.0, this instance of nixpkgs has Rust ${pkgs.rustc.version}";
+assert lib.assertMsg (lib.versionAtLeast pkgs.rustc.version "1.90.0")
+  "Wild requires at least Rust 1.90.0, this instance of nixpkgs has Rust ${pkgs.rustc.version}";
 
 let
   # Write a wrapper for GCC that passes -B to *unwrapped* binutils.