diff --git a/Cargo.lock b/Cargo.lock
index 3d03d4c5f55..50eb56a9d90 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1158,7 +1158,7 @@ dependencies = [
  "image",
  "insta",
  "pdfium-render",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
 ]
 
 [[package]]
@@ -1984,7 +1984,7 @@ dependencies = [
  "spin 0.9.8",
  "supports-color",
  "supports-unicode",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tracing",
  "tracing-error",
  "tracing-subscriber",
@@ -2505,7 +2505,7 @@ dependencies = [
  "multiaddr",
  "serde",
  "serde-value",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tokio-util",
  "tower 0.5.2",
 ]
@@ -2523,7 +2523,7 @@ dependencies = [
  "pin-project-lite",
  "serde",
  "serde_json",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tokio",
 ]
 
@@ -2561,7 +2561,7 @@ dependencies = [
  "serde",
  "tachyonix",
  "test-log",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tokio",
  "tokio-stream",
  "tokio-util",
@@ -2589,7 +2589,7 @@ dependencies = [
  "multiaddr",
  "scc",
  "serde",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tokio",
  "tokio-util",
  "tower 0.5.2",
@@ -2622,7 +2622,7 @@ dependencies = [
  "pin-project",
  "pin-project-lite",
  "serde",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tokio",
  "tokio-test",
  "tokio-util",
@@ -2656,7 +2656,7 @@ dependencies = [
  "serde_json",
  "similar-asserts",
  "test-strategy",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
 ]
 
 [[package]]
@@ -2918,7 +2918,7 @@ dependencies = [
  "postgres-types",
  "serde",
  "serde_json",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tokio",
  "tokio-postgres",
  "tracing",
@@ -3014,7 +3014,7 @@ dependencies = [
  "semver",
  "serde",
  "serde_json",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "time",
  "tokio",
  "trait-variant",
@@ -3038,7 +3038,7 @@ dependencies = [
  "regex",
  "serde",
  "serde_json",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tokio",
  "type-system",
  "url",
@@ -3061,7 +3061,7 @@ dependencies = [
  "inferno",
  "serde",
  "serde_json",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tokio",
  "walkdir",
 ]
@@ -3083,7 +3083,7 @@ dependencies = [
  "serde_json",
  "temporal-client",
  "temporal-sdk-core-protos",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "url",
  "uuid",
 ]
@@ -3282,7 +3282,7 @@ dependencies = [
  "serde_json",
  "serde_with",
  "text-size",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
 ]
 
 [[package]]
@@ -7139,7 +7139,7 @@ dependencies = [
  "slotmap",
  "temporal-sdk-core-api",
  "temporal-sdk-core-protos",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tokio",
  "tonic",
  "tower 0.5.2",
@@ -7160,7 +7160,7 @@ dependencies = [
  "prost-types",
  "serde_json",
  "temporal-sdk-core-protos",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tonic",
  "tracing-core",
  "url",
@@ -7182,7 +7182,7 @@ dependencies = [
  "prost-wkt-types",
  "serde",
  "serde_json",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tonic",
  "tonic-build",
 ]
@@ -7311,11 +7311,11 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "2.0.8"
+version = "2.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08f5383f3e0071702bf93ab5ee99b52d26936be9dedd9413067cbdcddcb6141a"
+checksum = "f072643fd0190df67a8bab670c20ef5d8737177d6ac6b2e9a236cb096206b2cc"
 dependencies = [
- "thiserror-impl 2.0.8",
+ "thiserror-impl 2.0.9",
 ]
 
 [[package]]
@@ -7331,9 +7331,9 @@ dependencies = [
 
 [[package]]
 name = "thiserror-impl"
-version = "2.0.8"
+version = "2.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2f357fcec90b3caef6623a099691be676d033b40a058ac95d2a6ade6fa0c943"
+checksum = "7b50fa271071aae2e6ee85f842e2e28ba8cd2c5fb67f11fcb1fd70b276f9e7d4"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -7925,7 +7925,7 @@ dependencies = [
  "regex",
  "serde",
  "serde_json",
- "thiserror 2.0.8",
+ "thiserror 2.0.9",
  "tokio",
  "tsify",
  "url",
diff --git a/Cargo.toml b/Cargo.toml
index 2497485afbe..fc37e1c0eb4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -220,7 +220,7 @@ temporal-sdk-core-protos = { git = "https://github.com/temporalio/sdk-core", rev
 test-fuzz                = { version = "=7.0.1", default-features = false }
 test-log                 = { version = "=0.2.16", default-features = false }
 test-strategy            = { version = "=0.4.0", default-features = false }
-thiserror                = { version = "=2.0.8", default-features = false }
+thiserror                = { version = "=2.0.9", default-features = false }
 tokio-stream             = { version = "=0.1.17", default-features = false }
 tokio-test               = { version = "=0.4.4", default-features = false }
 tower                    = { version = "=0.5.2", default-features = false }