diff --git a/src/OpenTelemetry/CHANGELOG.md b/src/OpenTelemetry/CHANGELOG.md
index a199243a46e..97376f4c7fb 100644
--- a/src/OpenTelemetry/CHANGELOG.md
+++ b/src/OpenTelemetry/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+* Increased the character limit of the Meter instrument name from 63 to 255.
+  ([#4774](https://github.com/open-telemetry/opentelemetry-dotnet/issues/4774))
+
 ## 1.6.0-rc.1
 
 Released 2023-Aug-21