diff --git a/CHANGELOG.md b/CHANGELOG.md
index 67692a8..5c593aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- Minimum supported Rust version incremented to 1.86 to support syntax introduced in [115](https://github.com/heroku/buildpacks-deb-packages/pull/115). ([#117](https://github.com/heroku/buildpacks-deb-packages/pull/117))
+
 ## [0.1.3] - 2025-04-01
 
 ### Added
diff --git a/Cargo.toml b/Cargo.toml
index cf11f35..bcc0358 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "buildpacks-deb-packages"
 edition = "2021"
-rust-version = "1.85"
+rust-version = "1.86"
 
 [build-dependencies]
 toml_edit = "0.22"