diff --git a/Cargo.toml b/Cargo.toml
index 9cecb213..5a8be6d4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,7 +28,7 @@ keywords = [
 license = "Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/matrix-construct/tuwunel"
-rust-version = "1.88.0"
+rust-version = "1.89.0"
 version = "1.4.5"
 
 [workspace.metadata.crane]
diff --git a/flake.nix b/flake.nix
index 0a3e954b..aa2978c9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,7 +26,7 @@
         file = ./rust-toolchain.toml;
 
         # See also `rust-toolchain.toml`
-        sha256 = "sha256-Qxt8XAuaUR2OMdKbN4u8dBJOhSHxS+uS06Wl9+flVEk=";
+        sha256 = "sha256-+9FmLhAOezBZCOziO0Qct1NOrfpjNsXxc/8I0c7BdKE=";
       };
 
       mkScope = pkgs: pkgs.lib.makeScope pkgs.newScope (self: {
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index a1afc235..28ba8200 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -9,7 +9,7 @@
 # If you're having trouble making the relevant changes, bug a maintainer.
 
 [toolchain]
-channel = "1.88.0"
+channel = "1.89.0"
 profile = "minimal"
 components = [
     # For rust-analyzer