diff --git a/opentelemetry-proto/CHANGELOG.md b/opentelemetry-proto/CHANGELOG.md
index f0eb11a528..a7f4f0a23a 100644
--- a/opentelemetry-proto/CHANGELOG.md
+++ b/opentelemetry-proto/CHANGELOG.md
@@ -2,7 +2,8 @@
 
 ## vNext
 
-- Update protobuf definitions to v1.1.0 [#1668](https://github.com/open-telemetry/opentelemetry-rust/pull/1668)
+- Update protobuf definitions to v1.2.0 [#1668](https://github.com/open-telemetry/opentelemetry-rust/pull/1668)
+- Update protobuf definitions to v1.3.1 [#1721](https://github.com/open-telemetry/opentelemetry-rust/pull/1721)
 
 ## v0.5.0
 
diff --git a/opentelemetry-proto/src/proto/opentelemetry-proto b/opentelemetry-proto/src/proto/opentelemetry-proto
index 24d4bc0020..b3060d2104 160000
--- a/opentelemetry-proto/src/proto/opentelemetry-proto
+++ b/opentelemetry-proto/src/proto/opentelemetry-proto
@@ -1 +1 @@
-Subproject commit 24d4bc002003c74db7aa608c8e254155daf8e49d
+Subproject commit b3060d2104df364136d75a35779e6bd48bac449a