diff --git a/README.md b/README.md
index 90ad7d3e54a..d4b0021798e 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,7 @@ calls and don't want them to feel excluded.
 
 ## Supported OTLP version
 
-This code base is currently built against using OTLP protocol v1.3.1,
+This code base is currently built against using OTLP protocol v1.4.0,
 considered Stable. [See the OpenTelemetry Protocol Stability
 definition
 here.](https://github.com/open-telemetry/opentelemetry-proto?tab=readme-ov-file#stability-definition)