diff --git a/Cargo.lock b/Cargo.lock
index 5f86470d3..5b0801a54 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -273,7 +273,7 @@ dependencies = [
  "snapbox",
  "stl_io",
  "tempfile",
- "thiserror 1.0.69",
+ "thiserror 2.0.6",
  "tokio",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index c58162708..ef0a2a537 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -143,7 +143,7 @@ snapbox = "0.6.10" # keep in sync with `trycmd`
 strum = { version = "0.26.3", default-features = false, features = ["derive"] }
 sync_wrapper = { version = "1.0.0", default-features = false }
 tempfile = { version = "3.3.0", default-features = false }
-thiserror = { version = "1.0.65", default-features = false }
+thiserror = { version = "2.0.6", default-features = false }
 time = { version = "0.3.36", default-features = false }
 # Tokio is used for async test-running and for certain binaries.
 # The library crates do not require Tokio.