diff --git a/lib/fluent-otel-proto b/lib/fluent-otel-proto
index 5eceb5b..99373d4 160000
--- a/lib/fluent-otel-proto
+++ b/lib/fluent-otel-proto
@@ -1 +1 @@
-Subproject commit 5eceb5b71d54860c619a149b4e82eb2d03b873d5
+Subproject commit 99373d42f9b028604ae774a51697596d18398977