diff --git a/Cargo.toml b/Cargo.toml
index a60cd077cd..a91ecbb4e0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,7 +40,7 @@ serde = { version = "1.0", default-features = false }
 serde_json = "1.0"
 temp-env = "0.3.6"
 thiserror = { version = "1", default-features = false }
-tonic = { version = "0.12", default-features = false }
+tonic = { version = "0.12.3", default-features = false }
 tonic-build = "0.12"
 tokio = { version = "1", default-features = false }
 tokio-stream = "0.1"
diff --git a/opentelemetry-proto/CHANGELOG.md b/opentelemetry-proto/CHANGELOG.md
index 3212534425..15903dcd66 100644
--- a/opentelemetry-proto/CHANGELOG.md
+++ b/opentelemetry-proto/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## vNext
 
+## v0.26.1
+
+- Require tonic 0.12.3 to match generated gRPC code [#2168](https://github.com/open-telemetry/opentelemetry-rust/pull/2168)
+
 ## v0.26.0
 Released 2024-Sep-30
 
diff --git a/opentelemetry-proto/Cargo.toml b/opentelemetry-proto/Cargo.toml
index 6b0243961b..9be1a9642c 100644
--- a/opentelemetry-proto/Cargo.toml
+++ b/opentelemetry-proto/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "opentelemetry-proto"
-version = "0.26.0"
+version = "0.26.1"
 description = "Protobuf generated files and transformations."
 homepage = "https://github.com/open-telemetry/opentelemetry-rust/tree/main/opentelemetry-proto"
 repository = "https://github.com/open-telemetry/opentelemetry-rust/tree/main/opentelemetry-proto"