diff --git a/Cargo.lock b/Cargo.lock
index ade5517d93..514becbb94 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1772,6 +1772,7 @@ dependencies = [
  "daft-table",
  "futures",
  "memchr",
+ "parking_lot",
  "pyo3",
  "rayon",
  "rstest",
diff --git a/src/daft-csv/Cargo.toml b/src/daft-csv/Cargo.toml
index ca74b9c2ec..0795719556 100644
--- a/src/daft-csv/Cargo.toml
+++ b/src/daft-csv/Cargo.toml
@@ -14,6 +14,7 @@ daft-io = {path = "../daft-io", default-features = false}
 daft-table = {path = "../daft-table", default-features = false}
 futures = {workspace = true}
 memchr = "2.7.2"
+parking_lot = "0.12.3"
 pyo3 = {workspace = true, optional = true}
 rayon = {workspace = true}
 serde = {workspace = true}
diff --git a/src/daft-csv/src/lib.rs b/src/daft-csv/src/lib.rs
index ce1a3615a9..4a738ab2a8 100644
--- a/src/daft-csv/src/lib.rs
+++ b/src/daft-csv/src/lib.rs
@@ -27,8 +27,6 @@ pub enum Error {
     #[snafu(display("{source}"))]
     IOError { source: daft_io::Error },
     #[snafu(display("{source}"))]
-    StdIOError { source: std::io::Error },
-    #[snafu(display("{source}"))]
     CSVError { source: csv_async::Error },
     #[snafu(display("Invalid char: {}", val))]
     WrongChar {