diff --git a/Cargo.lock b/Cargo.lock
index 1b8f651b..2e3df7d3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1423,7 +1423,7 @@ dependencies = [
  "sha2 0.10.8",
  "subtle",
  "test-support",
- "thiserror 2.0.9",
+ "thiserror 2.0.11",
  "time",
  "tokio",
  "tracing",
@@ -1479,7 +1479,7 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_yaml",
- "thiserror 2.0.9",
+ "thiserror 2.0.11",
  "time",
  "tokio",
  "trillium-rustls",
@@ -1506,7 +1506,7 @@ dependencies = [
  "serde",
  "serde_json",
  "test-support",
- "thiserror 2.0.9",
+ "thiserror 2.0.11",
  "time",
  "trillium",
  "trillium-client",
@@ -2717,7 +2717,7 @@ dependencies = [
  "prio",
  "rand",
  "serde",
- "thiserror 2.0.9",
+ "thiserror 2.0.11",
  "url",
 ]
 
@@ -2896,7 +2896,7 @@ dependencies = [
  "sea-orm",
  "sea-orm-migration",
  "serde_json",
- "thiserror 2.0.9",
+ "thiserror 2.0.11",
  "time",
  "tracing",
  "tracing-subscriber",
@@ -5076,7 +5076,7 @@ dependencies = [
  "serde",
  "serde_json",
  "test-harness",
- "thiserror 2.0.9",
+ "thiserror 2.0.11",
  "time",
  "tracing",
  "tracing-log",
@@ -5103,11 +5103,11 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "2.0.9"
+version = "2.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f072643fd0190df67a8bab670c20ef5d8737177d6ac6b2e9a236cb096206b2cc"
+checksum = "d452f284b73e6d76dd36758a0c8684b1d5be31f92b89d07fd5822175732206fc"
 dependencies = [
- "thiserror-impl 2.0.9",
+ "thiserror-impl 2.0.11",
 ]
 
 [[package]]
@@ -5123,9 +5123,9 @@ dependencies = [
 
 [[package]]
 name = "thiserror-impl"
-version = "2.0.9"
+version = "2.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b50fa271071aae2e6ee85f842e2e28ba8cd2c5fb67f11fcb1fd70b276f9e7d4"
+checksum = "26afc1baea8a989337eeb52b6e72a039780ce45c3edfcc9c5b9d112feeb173c2"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index fd6de200..b5553fc5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -53,7 +53,7 @@ serde_json = "1.0.134"
 serde_path_to_error = "0.1.16"
 sha2 = "0.10.8"
 subtle = "2.6.1"
-thiserror = "2.0.9"
+thiserror = "2.0.11"
 time = { version = "0.3.37", features = ["serde", "serde-well-known"] }
 tokio = { version = "1.42.0", features = ["full"] }
 tracing = "0.1.41"
diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index 66ae5c08..beda7b48 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -25,7 +25,7 @@ path = "src/main.rs"
 [dependencies]
 anyhow = "1"
 clap = { version = "4.5.26", features = ["derive", "env"] }
-thiserror = "2.0.9"
+thiserror = "2.0.11"
 divviup-client = { workspace = true }
 trillium-rustls = { version = "0.8.1", default-features = false }
 trillium-tokio = "0.4.0"
diff --git a/client/Cargo.toml b/client/Cargo.toml
index 6bcb5185..35e1085f 100644
--- a/client/Cargo.toml
+++ b/client/Cargo.toml
@@ -18,7 +18,7 @@ email_address = "0.2.9"
 prio = "0.16"
 serde = { version = "1.0.217", features = ["derive"] }
 serde_json = "1.0.134"
-thiserror = "2.0.9"
+thiserror = "2.0.11"
 trillium-client = { version = "0.6.2", features = ["json"] }
 trillium-http = "0.3.14"
 url = { version = "2.5.2", features = ["serde"] }
diff --git a/migration/Cargo.toml b/migration/Cargo.toml
index 2b500dee..3c658958 100644
--- a/migration/Cargo.toml
+++ b/migration/Cargo.toml
@@ -14,7 +14,7 @@ async-std = { version = "1", features = ["attributes", "tokio1"] }
 clap = { version = "4.5.26", features = ["env", "derive"] }
 sea-orm = "1.0.1"
 serde_json = "1.0.134"
-thiserror = "2.0.9"
+thiserror = "2.0.11"
 time = "0.3.37"
 tracing = "0.1.41"
 tracing-subscriber = "0.3.19"
diff --git a/test-support/Cargo.toml b/test-support/Cargo.toml
index 94d7d46f..9d58118d 100644
--- a/test-support/Cargo.toml
+++ b/test-support/Cargo.toml
@@ -13,7 +13,7 @@ trillium-testing = { version = "0.7.0", features = ["tokio"] }
 divviup-api.workspace = true
 serde = "1.0.217"
 serde_json = "1.0.134"
-thiserror = "2.0.9"
+thiserror = "2.0.11"
 tracing = "0.1.41"
 tracing-log = "0.2.0"
 tracing-subscriber = { version = "0.3.19", features = [