diff --git a/wagtail/images/templatetags/wagtailimages_tags.py b/wagtail/images/templatetags/wagtailimages_tags.py
index 79a460eae1..f86f53d989 100644
--- a/wagtail/images/templatetags/wagtailimages_tags.py
+++ b/wagtail/images/templatetags/wagtailimages_tags.py
@@ -1,5 +1,5 @@
 import re
-from functools import cache
+from functools import lru_cache
 
 from django import template
 from django.core.exceptions import ImproperlyConfigured
@@ -106,7 +106,7 @@ class ImageNode(template.Node):
         self.filter_specs = filter_specs
         self.preserve_svg = preserve_svg
 
-    @cache
+    @lru_cache()
     def get_filter(self, preserve_svg=False):
         if preserve_svg:
             return Filter(to_svg_safe_spec(self.filter_specs))
diff --git a/wagtail/images/utils.py b/wagtail/images/utils.py
index 84d388a839..2996b7d13b 100644
--- a/wagtail/images/utils.py
+++ b/wagtail/images/utils.py
@@ -126,6 +126,6 @@ def to_svg_safe_spec(filter_specs):
     safe_specs = [
         x
         for x in filter_specs
-        if any(map(lambda prefix: x.startswith(prefix), svg_preserving_specs))
+        if any(x.startswith(prefix) for prefix in svg_preserving_specs)
     ]
     return "|".join(safe_specs)