diff --git a/Cargo.lock b/Cargo.lock
index e393783..01b82b3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4373,7 +4373,7 @@ dependencies = [
  "synd-o11y",
  "synd-stdx",
  "synd-test",
- "thiserror 1.0.69",
+ "thiserror 2.0.3",
  "tokio",
  "tokio-metrics",
  "tokio-util",
@@ -4395,7 +4395,7 @@ dependencies = [
  "reqwest 0.12.9",
  "serde",
  "serde_json",
- "thiserror 1.0.69",
+ "thiserror 2.0.3",
  "tokio",
  "tracing",
 ]
@@ -4418,7 +4418,7 @@ dependencies = [
  "serde",
  "serde_json",
  "synd-o11y",
- "thiserror 1.0.69",
+ "thiserror 2.0.3",
  "tokio",
  "tokio-util",
  "tracing",
@@ -4440,7 +4440,7 @@ dependencies = [
  "synd-o11y",
  "synd-stdx",
  "tempfile",
- "thiserror 1.0.69",
+ "thiserror 2.0.3",
  "tokio",
  "toml",
  "tracing",
@@ -4455,7 +4455,7 @@ dependencies = [
  "chrono",
  "futures",
  "nom 8.0.0-alpha2",
- "thiserror 1.0.69",
+ "thiserror 2.0.3",
  "tokio",
  "tracing",
 ]
@@ -4541,7 +4541,7 @@ dependencies = [
  "synd-stdx",
  "synd-test",
  "tempfile",
- "thiserror 1.0.69",
+ "thiserror 2.0.3",
  "tokio",
  "tokio-stream",
  "tokio-util",
diff --git a/Cargo.toml b/Cargo.toml
index a2ad1a1..f7f701f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -51,7 +51,7 @@ schemars           = { version = "0.8.21", default-features = false, features =
 serde              = { version = "1", features = ["derive"] }
 serde_json         = { version = "1.0.133" }
 tempfile           = { version = "3" }
-thiserror          = { version = "1.0.69" }
+thiserror          = { version = "2.0.3" }
 tokio              = { version = "1.41", default-features = false }
 tokio-util         = { version = "0.7.12" }
 toml               = { version = "0.8.19" }