diff --git a/Cargo.lock b/Cargo.lock
index acccdc7..62866d0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,35 +17,24 @@ version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4b46cbb362ab8752921c97e041f5e366ee6297bd428a31275b9fcf1e380f7299"
 
+[[package]]
+name = "anstyle"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "038dfcf04a5feb68e9c60b21c9625a54c2c0616e79b72b0fd87075a056ae1d1b"
+
 [[package]]
 name = "anyhow"
 version = "1.0.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b3d1d046238990b9cf5bcde22a3fb3584ee5cf65fb2765f454ed428c7a0063da"
 
-[[package]]
-name = "atty"
-version = "0.2.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
-dependencies = [
- "hermit-abi",
- "libc",
- "winapi",
-]
-
 [[package]]
 name = "autocfg"
 version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c4b4d0bd25bd0b74681c0ad21497610ce1b7c91b1022cd21c80c6fbdd9476b0"
 
-[[package]]
-name = "bitflags"
-version = "1.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
-
 [[package]]
 name = "bitflags"
 version = "2.5.0"
@@ -99,24 +88,28 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "3.2.25"
+version = "4.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ea181bf566f71cb9a5d17a59e1871af638180a18fb0035c92ae62b705207123"
+checksum = "5db83dced34638ad474f39f250d7fea9598bdd239eaced1bdf45d597da0f433f"
 dependencies = [
- "bitflags 1.3.2",
+ "clap_builder",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.5.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7e204572485eb3fbf28f871612191521df159bc3e15a9f5064c66dba3a8c05f"
+dependencies = [
+ "anstyle",
  "clap_lex",
- "indexmap",
- "textwrap",
 ]
 
 [[package]]
 name = "clap_lex"
-version = "0.2.4"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2850f2f5a82cbf437dd5af4d49848fbdfc27c157c3d010345776f952765261c5"
-dependencies = [
- "os_str_bytes",
-]
+checksum = "4b82cf0babdbd58558212896d1a4272303a57bdb245c2bf1147185fb45640e70"
 
 [[package]]
 name = "console_error_panic_hook"
@@ -130,19 +123,19 @@ dependencies = [
 
 [[package]]
 name = "criterion"
-version = "0.4.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7c76e09c1aae2bc52b3d2f29e13c6572553b30c4aa1b8a49fd70de6412654cb"
+checksum = "f2b12d017a929603d80db1831cd3a24082f8137ce19c69e6447f54f5fc8d692f"
 dependencies = [
  "anes",
- "atty",
  "cast",
  "ciborium",
  "clap",
  "criterion-plot",
+ "is-terminal",
  "itertools",
- "lazy_static",
  "num-traits",
+ "once_cell",
  "oorandom",
  "plotters",
  "rayon",
@@ -281,12 +274,6 @@ dependencies = [
  "crunchy",
 ]
 
-[[package]]
-name = "hashbrown"
-version = "0.12.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
-
 [[package]]
 name = "heck"
 version = "0.4.1"
@@ -295,22 +282,9 @@ checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.19"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
-dependencies = [
- "libc",
-]
-
-[[package]]
-name = "indexmap"
-version = "1.9.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
-dependencies = [
- "autocfg",
- "hashbrown",
-]
+checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 
 [[package]]
 name = "indoc"
@@ -318,6 +292,17 @@ version = "2.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b248f5224d1d606005e02c97f5aa4e88eeb230488bcc03bc9ca4d7991399f2b5"
 
+[[package]]
+name = "is-terminal"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f23ff5ef2b80d608d61efee834934d862cd92461afc0560dedf493e4c033738b"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "windows-sys",
+]
+
 [[package]]
 name = "itertools"
 version = "0.10.5"
@@ -342,12 +327,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "lazy_static"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
-
 [[package]]
 name = "libc"
 version = "0.2.155"
@@ -406,12 +385,6 @@ version = "11.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
 
-[[package]]
-name = "os_str_bytes"
-version = "6.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2355d85b9a3786f481747ced0e0ff2ba35213a1f9bd406ed906554d7af805a1"
-
 [[package]]
 name = "parking_lot"
 version = "0.12.3"
@@ -471,9 +444,9 @@ checksum = "7170ef9988bc169ba16dd36a7fa041e5c4cbeb6a35b76d4c03daded371eae7c0"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.85"
+version = "1.0.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "22244ce15aa966053a896d1accb3a6e68469b97c7f33f284b99f0d576879fc23"
+checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
 dependencies = [
  "unicode-ident",
 ]
@@ -484,6 +457,7 @@ version = "0.21.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a5e00b96a521718e08e03b1a622f01c8a8deb50719335de3f60b3b3950f069d8"
 dependencies = [
+ "anyhow",
  "cfg-if",
  "indoc",
  "libc",
@@ -576,7 +550,7 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c82cf8cff14456045f55ec4241383baeff27af886adb72ffb2162f99911de0fd"
 dependencies = [
- "bitflags 2.5.0",
+ "bitflags",
 ]
 
 [[package]]
@@ -696,9 +670,9 @@ checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
 
 [[package]]
 name = "syn"
-version = "2.0.66"
+version = "2.0.67"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c42f3f41a2de00b01c0aaad383c5a45241efc8b2d1eda5661812fda5f3cdcff5"
+checksum = "ff8655ed1d86f3af4ee3fd3263786bc14245ad17c4c7e85ba7187fb3ae028c90"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -711,12 +685,6 @@ version = "0.12.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e1fc403891a21bcfb7c37834ba66a547a8f402146eba7265b5a6d88059c9ff2f"
 
-[[package]]
-name = "textwrap"
-version = "0.16.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23d434d3f8967a09480fb04132ebe0a3e088c173e6d0ee7897abbdf4eab0f8b9"
-
 [[package]]
 name = "thiserror"
 version = "1.0.61"
@@ -915,22 +883,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "winapi"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
-dependencies = [
- "winapi-i686-pc-windows-gnu",
- "winapi-x86_64-pc-windows-gnu",
-]
-
-[[package]]
-name = "winapi-i686-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-
 [[package]]
 name = "winapi-util"
 version = "0.1.8"
@@ -940,12 +892,6 @@ dependencies = [
  "windows-sys",
 ]
 
-[[package]]
-name = "winapi-x86_64-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-
 [[package]]
 name = "windows-sys"
 version = "0.52.0"
diff --git a/czv-python/Cargo.toml b/czv-python/Cargo.toml
index 24b0028..616902d 100644
--- a/czv-python/Cargo.toml
+++ b/czv-python/Cargo.toml
@@ -13,5 +13,5 @@ crate-type = ["cdylib", "rlib"]
 anyhow = "1.0.86"
 csv = "1.3.0"
 czv = { path = "../czv" }
-pyo3 = { version = "0.21.2", features = ["extension-module"] }
+pyo3 = { version = "0.21.2", features = ["anyhow", "extension-module"] }
 thiserror = "1.0.61"
diff --git a/czv-python/src/lib.rs b/czv-python/src/lib.rs
index 4c401de..8bdcc25 100644
--- a/czv-python/src/lib.rs
+++ b/czv-python/src/lib.rs
@@ -8,25 +8,25 @@ pub struct CzvError(anyhow::Error);
 
 impl From<OGError> for CzvError {
     fn from(value: OGError) -> Self {
-        value.into()
+        Self(anyhow::anyhow!(value))
     }
 }
 
 impl From<pyo3::PyErr> for CzvError {
     fn from(value: pyo3::PyErr) -> Self {
-        value.into()
+        Self(anyhow::anyhow!(value))
     }
 }
 
 impl From<csv::Error> for CzvError {
     fn from(value: csv::Error) -> Self {
-        value.into()
+        Self(anyhow::anyhow!(value))
     }
 }
 
 impl From<CzvError> for pyo3::PyErr {
     fn from(value: CzvError) -> Self {
-        value.into()
+        anyhow::anyhow!(value).into()
     }
 }
 
diff --git a/czv-wasm/src/lib.rs b/czv-wasm/src/lib.rs
index f51340d..286e831 100644
--- a/czv-wasm/src/lib.rs
+++ b/czv-wasm/src/lib.rs
@@ -44,19 +44,13 @@ use wasm_bindgen::JsValue;
 
 // Error-handling helpers
 #[derive(thiserror::Error, Debug)]
-#[error("{0}")]
-pub struct CzvError(anyhow::Error);
-
-impl From<csv::Error> for CzvError {
-    fn from(value: csv::Error) -> Self {
-        value.into()
-    }
-}
-
-impl From<serde_wasm_bindgen::Error> for CzvError {
-    fn from(value: serde_wasm_bindgen::Error) -> Self {
-        value.into()
-    }
+pub enum CzvError {
+    #[error("{0}")]
+    GeneralError(#[from] anyhow::Error),
+    #[error("{0}")]
+    CsvError(#[from] csv::Error),
+    #[error("{0}")]
+    SerdeWasmBindgenError(#[from] serde_wasm_bindgen::Error),
 }
 
 impl From<CzvError> for JsValue {
diff --git a/czv/Cargo.toml b/czv/Cargo.toml
index 9ca4510..5af3ba6 100644
--- a/czv/Cargo.toml
+++ b/czv/Cargo.toml
@@ -16,7 +16,7 @@ thiserror = "1.0.61"
 typed-builder = "0.18.2"
 
 [dev-dependencies]
-criterion = { version = "0.4", features = ["html_reports"] }
+criterion = { version = "0.5", features = ["html_reports"] }
 
 [[bench]]
 name = "benches"
diff --git a/czv/src/lib.rs b/czv/src/lib.rs
index d43d354..32e7969 100644
--- a/czv/src/lib.rs
+++ b/czv/src/lib.rs
@@ -55,13 +55,13 @@ pub struct CzvError(pub anyhow::Error);
 
 impl From<anyhow::Error> for CzvError {
     fn from(value: anyhow::Error) -> Self {
-        value.into()
+        Self(value)
     }
 }
 
 impl From<csv::Error> for CzvError {
     fn from(value: csv::Error) -> Self {
-        value.into()
+        Self(anyhow::anyhow!(value))
     }
 }