diff --git a/Cargo.lock b/Cargo.lock
index 30e4317a..b7997a5c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -185,7 +185,7 @@ dependencies = [
  "arrayvec",
  "criterion",
  "serde",
- "thiserror 2.0.19",
+ "thiserror 2.0.20",
 ]
 
 [[package]]
@@ -517,7 +517,7 @@ dependencies = [
  "anyhow",
  "chess",
  "rand",
- "thiserror 2.0.19",
+ "thiserror 2.0.20",
 ]
 
 [[package]]
@@ -1325,11 +1325,11 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "2.0.19"
+version = "2.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09a43598840e33d5b0331f38c5e30d13bb11c11210a4b58f0d9b18a5a5eefcd9"
+checksum = "ec86235f5fcc2a73650310756d2ac5b138a5780bbbdfae3eeccec992c435ba4f"
 dependencies = [
- "thiserror-impl 2.0.19",
+ "thiserror-impl 2.0.20",
 ]
 
 [[package]]
@@ -1345,9 +1345,9 @@ dependencies = [
 
 [[package]]
 name = "thiserror-impl"
-version = "2.0.19"
+version = "2.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43cbfe0cf76104d42a574802844187e84a305e531ed54455f11fbde0f10541cd"
+checksum = "bc04cd3e1236dd4a98afca4569f2deb3f120e5422a4023be2cb683f8486292af"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index 8041cbfc..6758b7c8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -34,7 +34,7 @@ rayon = "1.12.0"
 serde = "1.0.228"
 textplots = "0.8.7"
 toml = "1.1"
-thiserror = "2.0.18"
+thiserror = "2.0.20"
 uci-parser = "1.1.0"
 ctrlc = "3.5.2"
 rapidhash = "4.4.1"