diff --git a/geostore/tiles/helpers.py b/geostore/tiles/helpers.py
index 4ec2828b..c4549afa 100644
--- a/geostore/tiles/helpers.py
+++ b/geostore/tiles/helpers.py
@@ -1,4 +1,4 @@
-from hashlib import md5
+from hashlib import sha224
 from random import uniform
 
 import mercantile
@@ -200,7 +200,7 @@ def get_tile_cache_key(self, x, y, z):
         if self.properties_filter is not None:
             properties_filter_hash = ','.join(self.properties_filter)
 
-        return md5(
+        return sha224(
             f'tile_cache_{cache_key}_{x}_{y}_{z}'
             f'_{self.pixel_buffer}_{features_filter_hash}_{properties_filter_hash}'
             f'_{self.features_limit}'.encode()
diff --git a/geostore/tiles/mixins.py b/geostore/tiles/mixins.py
index 81126058..e74daf86 100644
--- a/geostore/tiles/mixins.py
+++ b/geostore/tiles/mixins.py
@@ -1,4 +1,4 @@
-from hashlib import md5
+from hashlib import sha224
 from urllib.parse import unquote, urljoin
 
 from django.core.cache import cache
@@ -54,7 +54,7 @@ def tiles_pattern(self, request, *args, **kwargs):
     def tilejson(self, request, *args, **kwargs):
         """ MVT layer tilejson """
         last_update = self.get_last_update()
-        cache_key = md5(
+        cache_key = sha224(
             f"tilejson-{self.get_object().name}{'-'.join([g.name for g in self.authenticated_groups])}".encode()
         ).hexdigest()
         version = int(last_update.timestamp())