diff --git a/src/aircrafts.rs b/src/aircrafts.rs
index 959cd01..a77bd57 100644
--- a/src/aircrafts.rs
+++ b/src/aircrafts.rs
@@ -1,4 +1,5 @@
 use std::collections::HashMap;
+use std::io::BufReader;
 use std::fs::File;
 use serde::Deserialize;
 
@@ -17,7 +18,7 @@ pub struct Aircrafts {
 
 impl Aircrafts {
     pub fn load(file: &str) -> Self {
-        let mut rdr = csv::Reader::from_reader(File::open(file).unwrap());
+        let mut rdr = csv::Reader::from_reader(BufReader::new(File::open(file).unwrap()));
         let mut data = HashMap::new();
         for result in rdr.deserialize() {
             let aircraft: Aircraft = result.unwrap();
diff --git a/src/location.rs b/src/location.rs
index f3c0766..cfd9b25 100644
--- a/src/location.rs
+++ b/src/location.rs
@@ -1,4 +1,5 @@
 use std::collections::HashMap;
+use std::io::BufReader;
 use std::fs::File;
 use std::sync::Arc;
 
@@ -35,7 +36,7 @@ pub struct Locations {
 impl Locations {
     pub fn load(file: &str) -> Self {
         println!("Loading {}...", file);
-        let json: serde_json::Value = serde_json::from_reader(File::open(file).unwrap())
+        let json: serde_json::Value = serde_json::from_reader(BufReader::new(File::open(file).unwrap()))
             .unwrap();
         println!("parsed JSON");
         let obj = json.as_object().expect("json obj");