diff --git a/src/iw4x.rs b/src/iw4x.rs
index 080addf..9f4312b 100644
--- a/src/iw4x.rs
+++ b/src/iw4x.rs
@@ -2,24 +2,17 @@ use crate::github;
 use crate::global::*;
 use crate::http_async;
 use crate::misc;
+use crate::structs;
 
-use std::{fs, path::Path};
-
-pub fn local_revision(dir: &Path) -> u16 {
-    if let Ok(revision) = fs::read_to_string(dir.join(".iw4xrevision")) {
-        misc::rev_to_int(&revision)
-    } else {
-        0
-    }
-}
+use std::path::Path;
 
 pub async fn remote_revision() -> u16 {
     misc::rev_to_int(&github::latest_tag(GH_IW4X_OWNER, GH_IW4X_REPO).await)
 }
 
-pub async fn update(dir: &Path) {
+pub async fn update(dir: &Path, cache: &mut structs::Cache) {
     let remote = remote_revision().await;
-    let local = local_revision(dir);
+    let local = misc::rev_to_int(&cache.iw4x_revision);
 
     if remote <= local && dir.join("iw4x.dll").exists() {
         crate::println_info!("No files to download for IW4x");
@@ -44,5 +37,6 @@ pub async fn update(dir: &Path) {
     )
     .await
     .unwrap();
-    fs::write(dir.join(".iw4xrevision"), format!("r{remote}")).unwrap();
+
+    cache.iw4x_revision = format!("r{remote}");
 }
diff --git a/src/main.rs b/src/main.rs
index 37d409a..1005f33 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -18,7 +18,12 @@ use indicatif::ProgressBar;
 #[cfg(windows)]
 use mslnk::ShellLink;
 use simple_log::LogConfigBuilder;
-use std::{borrow::Cow, collections::HashMap, env, fs, path::Path, path::PathBuf};
+use std::{
+    borrow::Cow,
+    collections::HashMap,
+    env, fs,
+    path::{Path, PathBuf},
+};
 #[cfg(windows)]
 use steamlocate::SteamDir;
 
@@ -328,20 +333,14 @@ async fn update(
         }
     }
 
-    let mut hashes = HashMap::new();
-    let hash_file = dir.join(".hashes");
-    if hash_file.exists() && !force {
-        let hash_file = fs::read_to_string(hash_file).unwrap();
-        for line in hash_file.lines() {
-            let mut split = line.split_whitespace();
-            let hash = split.next().unwrap();
-            let file = split.next().unwrap();
-            hashes.insert(file.to_owned(), hash.to_owned());
-        }
-    }
+    let mut cache = if force {
+        structs::Cache::default()
+    } else {
+        misc::get_cache(dir)
+    };
 
     if game.engine == "iw4" {
-        iw4x::update(dir).await;
+        iw4x::update(dir, &mut cache).await;
 
         let iw4x_dirs = vec!["iw4x", "zone/patch"];
         for d in &iw4x_dirs {
@@ -400,11 +399,19 @@ async fn update(
     }
 
     let pb = ProgressBar::new(0);
-    update_dir(&cdn_info, game.engine, dir, &mut hashes, &pb, skip_iw4x_sp).await;
+    update_dir(
+        &cdn_info,
+        game.engine,
+        dir,
+        &mut cache.hashes,
+        &pb,
+        skip_iw4x_sp,
+    )
+    .await;
 
     if bonus_content && !game.bonus.is_empty() {
         for bonus in game.bonus.iter() {
-            update_dir(&cdn_info, bonus, dir, &mut hashes, &pb, skip_iw4x_sp).await;
+            update_dir(&cdn_info, bonus, dir, &mut cache.hashes, &pb, skip_iw4x_sp).await;
         }
     }
 
@@ -435,11 +442,7 @@ async fn update(
         }
     }
 
-    let mut hash_file_content = String::new();
-    for (file, hash) in hashes.iter() {
-        hash_file_content.push_str(&format!("{hash} {file}\n"));
-    }
-    fs::write(dir.join(".hashes"), hash_file_content).unwrap();
+    misc::save_cache(dir, cache);
 }
 
 #[cfg(windows)]
diff --git a/src/misc.rs b/src/misc.rs
index 53c52d0..ac1ccb1 100644
--- a/src/misc.rs
+++ b/src/misc.rs
@@ -1,7 +1,11 @@
 use indicatif::{ProgressBar, ProgressStyle};
-use std::{fs, path::Path};
+use std::{
+    fs::{self, OpenOptions},
+    io::Write,
+    path::Path,
+};
 
-use crate::global;
+use crate::{global, structs};
 
 pub fn file_blake3(file: &std::path::Path) -> std::io::Result<String> {
     let mut blake3 = blake3::Hasher::new();
@@ -164,3 +168,31 @@ pub fn prefix(tag_name: &str) -> String {
         .get(tag_name)
         .map_or_else(|| tag_name.to_string(), |tag| tag.formatted())
 }
+
+pub fn get_cache(dir: &Path) -> structs::Cache {
+    let mut cache_file = OpenOptions::new()
+        .read(true)
+        .create(true)
+        .append(true)
+        .open(dir.join("awcache.json"))
+        .unwrap();
+    let mut cache_s = String::new();
+    std::io::Read::read_to_string(&mut cache_file, &mut cache_s).unwrap();
+    let cache: structs::Cache = if cache_s.trim().is_empty() {
+        structs::Cache::default()
+    } else {
+        serde_json::from_str(&cache_s).unwrap_or(structs::Cache::default())
+    };
+    cache
+}
+
+pub fn save_cache(dir: &Path, cache: structs::Cache) {
+    let mut cache_file = OpenOptions::new()
+        .write(true)
+        .create(true)
+        .truncate(true)
+        .open(dir.join("awcache.json"))
+        .unwrap();
+    let cache_serialized = serde_json::to_string_pretty(&cache).unwrap();
+    cache_file.write_all(cache_serialized.as_bytes()).unwrap();
+}
diff --git a/src/structs.rs b/src/structs.rs
index 94552e4..c8c6d72 100644
--- a/src/structs.rs
+++ b/src/structs.rs
@@ -1,5 +1,5 @@
 use colored::*;
-use std::path::Path;
+use std::{collections::HashMap, path::Path};
 
 #[derive(serde::Deserialize, serde::Serialize, Clone)]
 pub struct CdnFile {
@@ -74,3 +74,9 @@ impl PrintPrefix {
         format!("[{}]{:width$}", self.text, "", width = self.padding).to_string()
     }
 }
+
+#[derive(serde::Deserialize, serde::Serialize, Default)]
+pub struct Cache {
+    pub iw4x_revision: String,
+    pub hashes: HashMap<String, String>,
+}