diff --git a/CHANGELOG.md b/CHANGELOG.md
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@@ -1,8 +1,10 @@
 # Release 0.4.0
 
 ## What's Changed
-* Upgraded opentelementry to 0.25.0
-* Upgraded tracing-opentelementry to 0.26.0
+* Upgraded tracing-subscriber to 0.3.0
+* Upgraded opentelemetry to 0.25.0
+* Upgraded tracing-opentelemetry to 0.26.0
+* Tested on opentelemetry-collector v0.103.1 or lower. Newer versions may not yet work.
 
 ## Breakting Changes
 * Metrics capability has been removed! It is recommended to use the metrics or prometheus-client crate instead.