diff --git a/.gitignore b/.gitignore
index 8408db59..5bf633a8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,7 +10,7 @@ __pycache__
 *.partial
 *.onnx
 sorted_styles.json
-hash_cache.json
+hash_cache.txt
 /input
 /cache
 /language/default.json
diff --git a/modules/hash_cache.py b/modules/hash_cache.py
index bc9f479b..b2117ae9 100644
--- a/modules/hash_cache.py
+++ b/modules/hash_cache.py
@@ -1,15 +1,18 @@
-from modules.util import sha256, HASH_SHA256_LENGTH
-import os
 import json
-hash_cache_filename = 'hash_cache.json'
+import os
+
+from modules.util import sha256, HASH_SHA256_LENGTH
+
+hash_cache_filename = 'hash_cache.txt'
 hash_cache = {}
 
 
 def sha256_from_cache(filepath):
     global hash_cache
     if filepath not in hash_cache:
-        hash_cache[filepath] = sha256(filepath)
-        save_cache_to_file()
+        hash_value = sha256(filepath)
+        hash_cache[filepath] = hash_value
+        save_cache_to_file(filepath, hash_value)
 
     return hash_cache[filepath]
 
@@ -20,22 +23,33 @@ def load_cache_from_file():
     try:
         if os.path.exists(hash_cache_filename):
             with open(hash_cache_filename, 'rt', encoding='utf-8') as fp:
-                for filepath, hash in json.load(fp).items():
-                    if not os.path.exists(filepath) or not isinstance(hash, str) and len(hash) != HASH_SHA256_LENGTH:
-                        print(f'[Cache] Skipping invalid cache entry: {filepath}')
-                        continue
-                    hash_cache[filepath] = hash
+                for line in fp:
+                    entry = json.loads(line)
+                    for filepath, hash_value in entry.items():
+                        if not os.path.exists(filepath) or not isinstance(hash_value, str) and len(hash_value) != HASH_SHA256_LENGTH:
+                            print(f'[Cache] Skipping invalid cache entry: {filepath}')
+                            continue
+                        hash_cache[filepath] = hash_value
             print(f'[Cache] Warmed cache from file')
     except Exception as e:
         print(f'[Cache] Warming failed: {e}')
 
 
-def save_cache_to_file():
+def save_cache_to_file(filename=None, hash_value=None):
     global hash_cache
 
+    if filename is not None and hash_value is not None:
+        items = [(filename, hash_value)]
+        mode = 'at'
+    else:
+        items = sorted(hash_cache.items())
+        mode = 'wt'
+
     try:
-        with open(hash_cache_filename, 'wt', encoding='utf-8') as fp:
-            json.dump(hash_cache, fp, indent=4)
+        with open(hash_cache_filename, mode, encoding='utf-8') as fp:
+            for filepath, hash_value in items:
+                json.dump({filepath: hash_value}, fp)
+                fp.write('\n')
         print(f'[Cache] Updated cache file')
     except Exception as e:
         print(f'[Cache] Saving failed: {e}')