diff --git a/django/utils/html.py b/django/utils/html.py
index 06e8824f56..22d3ae42fa 100644
--- a/django/utils/html.py
+++ b/django/utils/html.py
@@ -16,25 +16,27 @@ from django.utils.safestring import SafeData, SafeString, mark_safe
 from django.utils.text import normalize_newlines
 
 # https://html.spec.whatwg.org/#void-elements
-VOID_ELEMENTS = {
-    "area",
-    "base",
-    "br",
-    "col",
-    "embed",
-    "hr",
-    "img",
-    "input",
-    "link",
-    "meta",
-    "param",
-    "source",
-    "track",
-    "wbr",
-    # Deprecated tags.
-    "frame",
-    "spacer",
-}
+VOID_ELEMENTS = frozenset(
+    (
+        "area",
+        "base",
+        "br",
+        "col",
+        "embed",
+        "hr",
+        "img",
+        "input",
+        "link",
+        "meta",
+        "param",
+        "source",
+        "track",
+        "wbr",
+        # Deprecated tags.
+        "frame",
+        "spacer",
+    )
+)
 
 
 @keep_lazy(SafeString)