diff --git a/deps/v8/include/v8-version.h b/deps/v8/include/v8-version.h
index 4d5266ba421bc6..a73d31b083c5bf 100644
--- a/deps/v8/include/v8-version.h
+++ b/deps/v8/include/v8-version.h
@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 5
 #define V8_MINOR_VERSION 0
 #define V8_BUILD_NUMBER 71
-#define V8_PATCH_LEVEL 58
+#define V8_PATCH_LEVEL 59
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)
diff --git a/deps/v8/src/regexp/jsregexp.cc b/deps/v8/src/regexp/jsregexp.cc
index 80f48ca1a9fd34..4255e7e6736ec0 100644
--- a/deps/v8/src/regexp/jsregexp.cc
+++ b/deps/v8/src/regexp/jsregexp.cc
@@ -5877,6 +5877,7 @@ Vector<const int> CharacterRange::GetWordBounds() {
 void CharacterRange::AddCaseEquivalents(Isolate* isolate, Zone* zone,
                                         ZoneList<CharacterRange>* ranges,
                                         bool is_one_byte) {
+  CharacterRange::Canonicalize(ranges);
   int range_count = ranges->length();
   for (int i = 0; i < range_count; i++) {
     CharacterRange range = ranges->at(i);
diff --git a/deps/v8/test/mjsunit/regress/regress-5199.js b/deps/v8/test/mjsunit/regress/regress-5199.js
new file mode 100644
index 00000000000000..818e71a06d30f8
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-5199.js
@@ -0,0 +1,5 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+assertTrue(/(a[\u1000A])+/i.test('aa'));