diff --git a/src/detections/detection.rs b/src/detections/detection.rs
index 6aaa6179..71edb905 100644
--- a/src/detections/detection.rs
+++ b/src/detections/detection.rs
@@ -13,8 +13,8 @@ use crate::detections::utils::get_serde_number_to_string;
 use crate::filter;
 use crate::yaml::ParseYaml;
 use hashbrown;
+use hashbrown::HashMap;
 use serde_json::Value;
-use std::collections::HashMap;
 use std::io::BufWriter;
 use std::sync::Arc;
 use tokio::{runtime::Runtime, spawn, task::JoinHandle};
diff --git a/src/detections/rule/condition_parser.rs b/src/detections/rule/condition_parser.rs
index d6f02e03..a2e7e8f2 100644
--- a/src/detections/rule/condition_parser.rs
+++ b/src/detections/rule/condition_parser.rs
@@ -5,7 +5,8 @@ use self::selectionnodes::{
     AndSelectionNode, NotSelectionNode, OrSelectionNode, RefSelectionNode, SelectionNode,
 };
 use super::selectionnodes;
-use std::{collections::HashMap, sync::Arc};
+use hashbrown::HashMap;
+use std::sync::Arc;
 
 lazy_static! {
     pub static ref CONDITION_REGEXMAP: Vec<Regex> = vec![
diff --git a/src/detections/rule/mod.rs b/src/detections/rule/mod.rs
index 3c7b328b..be9c871c 100644
--- a/src/detections/rule/mod.rs
+++ b/src/detections/rule/mod.rs
@@ -3,7 +3,8 @@ use crate::detections::print::Message;
 
 use chrono::{DateTime, Utc};
 
-use std::{collections::HashMap, fmt::Debug, sync::Arc, vec};
+use hashbrown::HashMap;
+use std::{fmt::Debug, sync::Arc, vec};
 
 use yaml_rust::Yaml;
 
diff --git a/src/filter.rs b/src/filter.rs
index f562f60b..2d202613 100644
--- a/src/filter.rs
+++ b/src/filter.rs
@@ -2,9 +2,9 @@ use crate::detections::configs;
 use crate::detections::print::AlertMessage;
 use crate::detections::print::ERROR_LOG_STACK;
 use crate::detections::print::QUIET_ERRORS_FLAG;
+use hashbrown::HashSet;
 use lazy_static::lazy_static;
 use regex::Regex;
-use std::collections::HashSet;
 use std::fs::File;
 use std::io::BufWriter;
 use std::io::{BufRead, BufReader};
diff --git a/src/timeline/statistics.rs b/src/timeline/statistics.rs
index 7aca3a03..492600b0 100644
--- a/src/timeline/statistics.rs
+++ b/src/timeline/statistics.rs
@@ -1,5 +1,5 @@
 use crate::detections::{configs, detection::EvtxRecordInfo, utils};
-use std::collections::HashMap;
+use hashbrown::HashMap;
 
 #[derive(Debug)]
 pub struct EventStatistics {
diff --git a/src/timeline/timeline.rs b/src/timeline/timeline.rs
index 5b0a9c57..5657fb3b 100644
--- a/src/timeline/timeline.rs
+++ b/src/timeline/timeline.rs
@@ -1,7 +1,7 @@
 use crate::detections::{configs, detection::EvtxRecordInfo};
 
 use super::statistics::EventStatistics;
-use std::collections::HashMap;
+use hashbrown::HashMap;
 
 #[derive(Debug)]
 pub struct Timeline {
diff --git a/src/yaml.rs b/src/yaml.rs
index ffec4f1e..5e4bc087 100644
--- a/src/yaml.rs
+++ b/src/yaml.rs
@@ -6,7 +6,7 @@ use crate::detections::print::AlertMessage;
 use crate::detections::print::ERROR_LOG_STACK;
 use crate::detections::print::QUIET_ERRORS_FLAG;
 use crate::filter::RuleExclude;
-use std::collections::HashMap;
+use hashbrown::HashMap;
 use std::ffi::OsStr;
 use std::fs;
 use std::io;
@@ -269,7 +269,7 @@ mod tests {
     use crate::filter;
     use crate::yaml;
     use crate::yaml::RuleExclude;
-    use std::collections::HashSet;
+    use hashbrown::HashSet;
     use std::path::Path;
     use yaml_rust::YamlLoader;