diff --git a/Cargo.lock b/Cargo.lock
index b431fc4..ded1f71 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -568,12 +568,12 @@ checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
 [[package]]
 name = "prettyplease"
-version = "0.1.25"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c8646e95016a7a6c4adea95bafa8a16baab64b583356217f2c85db4a39d9a86"
+checksum = "ae005bd773ab59b4725093fd7df83fd7892f7d8eafb48dbd7de6e024e4215f9d"
 dependencies = [
  "proc-macro2",
- "syn 1.0.109",
+ "syn 2.0.37",
 ]
 
 [[package]]
diff --git a/aoc-build/Cargo.toml b/aoc-build/Cargo.toml
index fc66459..21ec34b 100644
--- a/aoc-build/Cargo.toml
+++ b/aoc-build/Cargo.toml
@@ -8,6 +8,6 @@ license = "Apache-2.0/MIT"
 
 [dependencies]
 eyre = "0.6.8"
-prettyplease = "0.1.25"
+prettyplease = "0.2.15"
 regex = "1.9.5"
 syn = "1.0.109"