diff --git a/DEPS b/DEPS
index c3d6ef2..8253cd1 100644
--- a/DEPS
+++ b/DEPS
@@ -163,7 +163,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling partition_allocator
   # and whatever else without interference from each other.
-  'partition_allocator_revision': 'c2bb1848ed490e596de26b28c9f9760d9b4ef387',
+  'partition_allocator_revision': 'c702699cceb42a9b43296000129f46a8a419651c',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling pdfium_tests
   # and whatever else without interference from each other.
diff --git a/build_overrides/partition_alloc.gni b/build_overrides/partition_alloc.gni
index 3ed38af..521c6fa 100644
--- a/build_overrides/partition_alloc.gni
+++ b/build_overrides/partition_alloc.gni
@@ -53,3 +53,7 @@
 raw_ptr_zero_on_construct_default = true
 raw_ptr_zero_on_move_default = true
 raw_ptr_zero_on_destruct_default = false
+
+# Allow embedders to opt-out of C++20 build which is set as default.
+# Set to true to use C++20 by default.
+assert_cpp20_default = true