diff --git a/Cargo.toml b/Cargo.toml
index e243c24..3a65ec2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "oarfish"
-version = "0.5.0"
+version = "0.5.1"
 edition = "2021"
 authors = [
   "Zahra Zare Jousheghani <zzare@umd.edu>",
diff --git a/src/main.rs b/src/main.rs
index 63f7ee2..688b424 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,11 +4,7 @@ use std::num::NonZeroUsize;
 use anyhow::Context;
 use arrow2::{array::Float64Array, chunk::Chunk, datatypes::Field};
 
-use std::{
-    fs::File,
-    io::{self, BufReader},
-    path::PathBuf,
-};
+use std::{fs::File, io, path::PathBuf};
 
 use num_format::{Locale, ToFormattedString};
 use serde::Serialize;
@@ -301,6 +297,9 @@ fn main() -> anyhow::Result<()> {
     // print discard table information in which the user might be interested.
     info!("\ndiscard_table: \n{}\n", store.discard_table.to_table());
 
+    // no longer need the reader
+    drop(reader);
+
     // if we are using the KDE, create that here.
     let kde_opt: Option<kders::kde::KDEModel> = if args.use_kde {
         Some(kde_utils::get_kde_model(&txps, &store)?)