diff --git a/src/lib/rainbowutils.rs b/src/lib/rainbowutils.rs
index 4b166b7..c6f345b 100644
--- a/src/lib/rainbowutils.rs
+++ b/src/lib/rainbowutils.rs
@@ -1,6 +1,5 @@
 use byteorder::{BigEndian, ByteOrder};
 use crc::crc32;
-use rayon::prelude::*;
 use std::collections::HashMap;
 use std::convert::{TryFrom, TryInto};
 use std::fs::File;
@@ -300,12 +299,8 @@ impl GenericChunk {
         lookup_table: &HashLookupTable,
     ) -> GenericChunk {
         let mut serialized_data: Vec<u8> = Vec::new();
-        let serialized_entries: Vec<Vec<u8>> = entries
-            .par_iter()
-            .map(|entry: &DataEntry| entry.serialize(lookup_table.clone()))
-            .collect();
-        serialized_entries.iter().for_each(|entry| {
-            serialized_data.append(&mut entry.clone());
+        entries.iter().for_each(|entry| {
+            serialized_data.append(&mut entry.serialize(&lookup_table));
         });
         let crc_sum = crc32::checksum_ieee(serialized_data.as_slice());
 
@@ -562,7 +557,7 @@ impl DataEntry {
     }
 
     /// Serializes the entry to a vector of bytes
-    pub fn serialize(&self, lookup_table: HashLookupTable) -> Vec<u8> {
+    pub fn serialize(&self, lookup_table: &HashLookupTable) -> Vec<u8> {
         let mut pw_plain_raw = self.plain.clone().into_bytes();
         let mut pw_length_raw = [0u8; 4];
         BigEndian::write_u32(&mut pw_length_raw, pw_plain_raw.len() as u32);
diff --git a/src/main.rs b/src/main.rs
index 2e8593e..a178495 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -162,6 +162,7 @@ fn decrypt(_opts: &Opts, args: &Decrypt) {
 const SHA256: &str = "sha256";
 /// Creates a dictionary from an input file and writes it to the output file
 fn create_dictionary(_opts: &Opts, args: &CreateDictionary) {
+    let sp = spinner("Reading input file...");
     let input: String = (*args.input).parse().unwrap();
     // TODO: Some form of removing duplicates (without itertools)
     let fout = File::create(args.output.clone()).unwrap();
@@ -171,9 +172,10 @@ fn create_dictionary(_opts: &Opts, args: &CreateDictionary) {
         let content = fs::read_to_string(input).expect("Failed to read content");
         let lines = content.par_lines();
         let entry_count = lines.clone().count() as u64;
+        sp.stop();
         let mut pb = ProgressBar::new(entry_count);
         pb.set_max_refresh_rate(Some(Duration::from_millis(200)));
-        let (rx, tx) = sync_channel::<DataEntry>(100_000_000);
+        let (rx, tx) = sync_channel::<DataEntry>(100_000);
         let mut bdf_file = BDFWriter::new(writer, entry_count, args.compress);
         bdf_file
             .add_lookup_entry(HashEntry::new(SHA256.to_string(), 32))