diff --git a/.gitignore b/.gitignore
index 2885782..62a5815 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,4 +16,6 @@ config.yaml
 config-*.yaml
 logs/*
 local_archive/
-vk_config*.json
\ No newline at end of file
+vk_config*.json
+
+secrets/*
\ No newline at end of file
diff --git a/archivers/base_archiver.py b/archivers/base_archiver.py
index 815d31e..8951115 100644
--- a/archivers/base_archiver.py
+++ b/archivers/base_archiver.py
@@ -31,9 +31,10 @@ class Archiver(ABC):
     name = "default"
     retry_regex = r"retrying at (\d+)$"
 
-    def __init__(self, storage: Storage, driver):
+    def __init__(self, storage: Storage, driver, hash_algorithm):
         self.storage = storage
         self.driver = driver
+        self.hash_algorithm = hash_algorithm
 
     def __str__(self):
         return self.__class__.__name__
@@ -163,10 +164,13 @@ class Archiver(ABC):
     def get_hash(self, filename):
         with open(filename, "rb") as f:
             bytes = f.read()  # read entire file as bytes
-            # TODO: customizable hash
-            hash = hashlib.sha256(bytes)
-            # option to use SHA3_512 instead
-            # hash = hashlib.sha3_512(bytes)
+            ha = self.hash_algorithm
+            logger.debug(f'Hash algorithm is {ha}')
+
+            if ha == "SHA3_512": hash = hashlib.sha3_512(bytes)
+            elif ha == "SHA256": hash = hashlib.sha256(bytes)
+            else: raise Exception("Unknown Hash Algorithm of {ha}")
+
         return hash.hexdigest()
 
     def get_screenshot(self, url):
diff --git a/archivers/telegram_archiver.py b/archivers/telegram_archiver.py
index 0b6e777..c38dd30 100644
--- a/archivers/telegram_archiver.py
+++ b/archivers/telegram_archiver.py
@@ -11,6 +11,9 @@ from storages import Storage
 class TelegramArchiver(Archiver):
     name = "telegram"
 
+    def __init__(self, storage: Storage, driver, hash_algorithm):
+        super().__init__(storage, driver, hash_algorithm)
+
     def download(self, url, check_if_exists=False):
         # detect URLs that we definitely cannot handle
         if 't.me' != self.get_netloc(url):
diff --git a/archivers/telethon_archiver.py b/archivers/telethon_archiver.py
index f35e323..bce34d2 100644
--- a/archivers/telethon_archiver.py
+++ b/archivers/telethon_archiver.py
@@ -15,8 +15,8 @@ class TelethonArchiver(Archiver):
     name = "telethon"
     link_pattern = re.compile(r"https:\/\/t\.me(\/c){0,1}\/(.+)\/(\d+)")
 
-    def __init__(self, storage: Storage, driver, config: TelethonConfig):
-        super().__init__(storage, driver)
+    def __init__(self, storage: Storage, driver, config: TelethonConfig, hash_algorithm):
+        super().__init__(storage, driver, hash_algorithm)
         if config:
             self.client = TelegramClient("./anon", config.api_id, config.api_hash)
             self.bot_token = config.bot_token
diff --git a/archivers/tiktok_archiver.py b/archivers/tiktok_archiver.py
index 8100bb1..30b8c7c 100644
--- a/archivers/tiktok_archiver.py
+++ b/archivers/tiktok_archiver.py
@@ -15,6 +15,9 @@ class TiktokArchiver(Archiver):
 
         status = 'success'
 
+        def __init__(self, storage: Storage, driver, hash_algorithm):
+            super().__init__(storage, driver, hash_algorithm)
+
         try:
             info = tiktok_downloader.info_post(url)
             key = self.get_key(f'{info.id}.mp4')
diff --git a/archivers/twitter_api_archiver.py b/archivers/twitter_api_archiver.py
index ef2bf40..99fb8f1 100644
--- a/archivers/twitter_api_archiver.py
+++ b/archivers/twitter_api_archiver.py
@@ -13,8 +13,8 @@ from .twitter_archiver import TwitterArchiver
 class TwitterApiArchiver(TwitterArchiver):
     name = "twitter_api"
 
-    def __init__(self, storage: Storage, driver, config: TwitterApiConfig):
-        super().__init__(storage, driver)
+    def __init__(self, storage: Storage, driver, config: TwitterApiConfig, hash_algorithm):
+        super().__init__(storage, driver, hash_algorithm)
 
         if config.bearer_token:
             self.api = Api(bearer_token=config.bearer_token)
@@ -54,7 +54,7 @@ class TwitterApiArchiver(TwitterArchiver):
 
             for u in urls:
                 if u is None:
-                    logger.error(f"Should not have gotten None url for {tweet.includes.media=}")
+                    logger.debug(f"Should not have gotten None url for {tweet.includes.media=} so going to download_alternative in twitter_archiver")
                     return self.download_alternative(url, tweet_id)
         logger.debug(f"found {urls=}")
 
diff --git a/archivers/twitter_archiver.py b/archivers/twitter_archiver.py
index 1c1b173..750d2c4 100644
--- a/archivers/twitter_archiver.py
+++ b/archivers/twitter_archiver.py
@@ -5,12 +5,16 @@ from snscrape.modules.twitter import TwitterTweetScraper, Video, Gif, Photo
 
 from .base_archiver import Archiver, ArchiveResult
 
+from storages import Storage
 
 class TwitterArchiver(Archiver):
     """
     This Twitter Archiver uses unofficial scraping methods, and it works as 
     an alternative to TwitterApiArchiver when no API credentials are provided.
     """
+    def __init__(self, storage: Storage, driver, hash_algorithm):
+        super().__init__(storage, driver, hash_algorithm)
+
     name = "twitter"
     link_pattern = re.compile(r"twitter.com\/(?:\#!\/)?(\w+)\/status(?:es)?\/(\d+)")
 
diff --git a/archivers/vk_archiver.py b/archivers/vk_archiver.py
index c448367..6ddba10 100644
--- a/archivers/vk_archiver.py
+++ b/archivers/vk_archiver.py
@@ -17,8 +17,8 @@ class VkArchiver(Archiver):
     wall_pattern = re.compile(r"(wall.{0,1}\d+_\d+)")
     photo_pattern = re.compile(r"(photo.{0,1}\d+_\d+)")
 
-    def __init__(self, storage: Storage, driver, config: VkConfig):
-        super().__init__(storage, driver)
+    def __init__(self, storage: Storage, driver, config: VkConfig, hash_algorithm):
+        super().__init__(storage, driver, hash_algorithm)
         if config != None:
             self.vks = VkScraper(config.username, config.password)
 
diff --git a/archivers/wayback_archiver.py b/archivers/wayback_archiver.py
index f46d1cb..c19ca4f 100644
--- a/archivers/wayback_archiver.py
+++ b/archivers/wayback_archiver.py
@@ -15,8 +15,8 @@ class WaybackArchiver(Archiver):
     """
     name = "wayback"
 
-    def __init__(self, storage: Storage, driver, config: WaybackConfig):
-        super(WaybackArchiver, self).__init__(storage, driver)
+    def __init__(self, storage: Storage, driver, config: WaybackConfig, hash_algorithm):
+        super(WaybackArchiver, self).__init__(storage, driver, hash_algorithm)
         self.config = config
         self.seen_urls = {}
 
diff --git a/archivers/youtubedl_archiver.py b/archivers/youtubedl_archiver.py
index 7990131..a41b6c6 100644
--- a/archivers/youtubedl_archiver.py
+++ b/archivers/youtubedl_archiver.py
@@ -12,8 +12,8 @@ class YoutubeDLArchiver(Archiver):
     name = "youtube_dl"
     ydl_opts = {'outtmpl': f'{Storage.TMP_FOLDER}%(id)s.%(ext)s', 'quiet': False}
 
-    def __init__(self, storage: Storage, driver, fb_cookie):
-        super().__init__(storage, driver)
+    def __init__(self, storage: Storage, driver, fb_cookie, hash_algorithm):
+        super().__init__(storage, driver, hash_algorithm)
         self.fb_cookie = fb_cookie
 
     def download(self, url, check_if_exists=False):
diff --git a/auto_archive.py b/auto_archive.py
index f12b9c4..72cb748 100644
--- a/auto_archive.py
+++ b/auto_archive.py
@@ -104,14 +104,14 @@ def process_sheet(c: Config):
 
                 # order matters, first to succeed excludes remaining
                 active_archivers = [
-                    TelethonArchiver(storage, c.webdriver, c.telegram_config),
-                    TiktokArchiver(storage, c.webdriver),
-                    TwitterApiArchiver(storage, c.webdriver, c.twitter_config),
-                    YoutubeDLArchiver(storage, c.webdriver, c.facebook_cookie),
-                    TelegramArchiver(storage, c.webdriver),
-                    TwitterArchiver(storage, c.webdriver),
-                    VkArchiver(storage, c.webdriver, c.vk_config),
-                    WaybackArchiver(storage, c.webdriver, c.wayback_config)
+                    TelethonArchiver(storage, c.webdriver, c.telegram_config, c.hash_algorithm),
+                    TiktokArchiver(storage, c.webdriver, c.hash_algorithm),
+                    TwitterApiArchiver(storage, c.webdriver, c.twitter_config, c.hash_algorithm),
+                    YoutubeDLArchiver(storage, c.webdriver, c.facebook_cookie,c.hash_algorithm),
+                    TelegramArchiver(storage, c.webdriver, c.hash_algorithm),
+                    TwitterArchiver(storage, c.webdriver, c.hash_algorithm),
+                    VkArchiver(storage,  c.webdriver, c.vk_config, c.hash_algorithm),
+                    WaybackArchiver(storage, c.webdriver, c.wayback_config, c.hash_algorithm)
                 ]
 
                 for archiver in active_archivers:
diff --git a/configs/config.py b/configs/config.py
index 41b531a..2d134da 100644
--- a/configs/config.py
+++ b/configs/config.py
@@ -81,6 +81,8 @@ class Config:
         )
         self.webdriver = "not initialized"
 
+        self.hash_algorithm = execution.get("hash_algorithm")
+
         # ---------------------- SECRETS - APIs and service configurations
         secrets = self.config.get("secrets", {})
 
diff --git a/example.config.yaml b/example.config.yaml
index 3092efc..f823c47 100644
--- a/example.config.yaml
+++ b/example.config.yaml
@@ -104,3 +104,8 @@ execution:
     duration: duration
     screenshot: screenshot
     hash: hash
+
+  # Must be either SHA256 or SHA3_512
+  hash_algorithm: SHA3_512
+  # hash_algorithm: SHA256
+