diff --git a/.gitmodules b/.gitmodules
index 597e246..ef5a99f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,4 +1,4 @@
 [submodule "third_party/valgrind"]
 	path = third_party/valgrind
 	url = https://sourceware.org/git/valgrind.git
-	branch = VALGRIND_3_26_0
+	branch = VALGRIND_3_27_0
diff --git a/third_party/valgrind b/third_party/valgrind
index 218cee2..b80fd12 160000
--- a/third_party/valgrind
+++ b/third_party/valgrind
@@ -1 +1 @@
-Subproject commit 218cee2feb2556b6b4b8991cf0977256b801e3e5
+Subproject commit b80fd124192df64c168b4bbd8ef68a3c0abbba28