diff --git a/libcxx/.clang-format b/libcxx/.clang-format
--- a/libcxx/.clang-format
+++ b/libcxx/.clang-format
@@ -2,7 +2,7 @@
 
 ---
 Language: Cpp
-Standard: Cpp03
+Standard: Cpp11
 
 AlwaysBreakTemplateDeclarations: true
 PointerAlignment: Left
@@ -10,4 +10,8 @@
 # Disable formatting options which may break tests.
 SortIncludes: false
 ReflowComments: false
+
+# These aren't covered by the LLVM Style Guide
+BreakBeforeConceptDeclarations: true
+IndentRequires: false
 ---