diff --git a/Cargo.lock b/Cargo.lock
index 61e7596..732faa3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1018,18 +1018,18 @@ checksum = "adb6935a6f5c20170eeceb1a3835a49e12e19d792f6dd344ccc76a985ca5a6ca"
 
 [[package]]
 name = "thiserror"
-version = "1.0.69"
+version = "2.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
+checksum = "4288b5bcbc7920c07a1149a35cf9590a2aa808e0bc1eafaade0b80947865fbc4"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.69"
+version = "2.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
+checksum = "ebc4ee7f67670e9b64d05fa4253e753e016c6c95ff35b89b7941d6b856dec1d5"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index dad3e95..390983a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -74,7 +74,7 @@ serde_json = "1"
 clap = { version = "4", features = ["derive"] }
 # Error ergonomics.
 anyhow = "1"
-thiserror = "1"
+thiserror = "2"
 # Optional heap profiler (Q-08). Only pulled in when the `dhat-heap`
 # feature is enabled — default builds have zero cost. Pinned to 0.3
 # (current stable API).