diff --git a/Cargo.lock b/Cargo.lock
index 8c048fb9..7c3f5407 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2031,18 +2031,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.69"
+version = "2.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
+checksum = "567b8a2dae586314f7be2a752ec7474332959c6460e02bde30d702a66d488708"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.69"
+version = "2.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
+checksum = "7f7cf42b4507d8ea322120659672cf1b9dbb93f8f2d4ecfd6e51350ff5b17a1d"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/picky-krb/Cargo.toml b/picky-krb/Cargo.toml
index 7921586d..e0b4e241 100644
--- a/picky-krb/Cargo.toml
+++ b/picky-krb/Cargo.toml
@@ -18,7 +18,7 @@ picky-asn1-der = { version = "0.5", path = "../picky-asn1-der" }
 picky-asn1-x509 = { version = "0.14", path = "../picky-asn1-x509" }
 serde = { version = "1", features = ["derive"] }
 byteorder = "1.5"
-thiserror = "1"
+thiserror = "2"
 
 pbkdf2 = { version = "0.12", features = ["sha1"] }
 hmac = "0.12"
diff --git a/picky/Cargo.toml b/picky/Cargo.toml
index 799616d3..272cd8b2 100644
--- a/picky/Cargo.toml
+++ b/picky/Cargo.toml
@@ -26,7 +26,7 @@ picky-asn1-der = { version = "0.5", path = "../picky-asn1-der" }
 picky-asn1-x509 = { version = "0.14", path = "../picky-asn1-x509", features = ["legacy", "zeroize"] }
 serde = { version = "1", features = ["derive"] }
 base64 = "0.22"
-thiserror = "1"
+thiserror = "2"
 byteorder = { version = "1.5", optional = true }
 chrono = { version = "0.4", default-features = false, features = ["clock"], optional = true }
 time = { version = "0.3", optional = true }