diff --git a/DEPS b/DEPS
index 8874cce..efb8201 100644
--- a/DEPS
+++ b/DEPS
@@ -532,6 +532,7 @@
   '-third_party/abseil-cpp/absl/synchronization',
   '-third_party/abseil-cpp/absl/time',
   '-third_party/abseil-cpp/absl/types/any.h',
+  '-third_party/abseil-cpp/absl/types/optional.h',
   '-third_party/abseil-cpp/absl/types/span.h',
 ]