diff --git a/CHANGELOG.asciidoc b/CHANGELOG.asciidoc
index f279ef0f0..e1c99ccf5 100644
--- a/CHANGELOG.asciidoc
+++ b/CHANGELOG.asciidoc
@@ -23,6 +23,13 @@ endif::[]
 [[release-notes-1.x]]
 === .NET Agent version 1.x
 
+[[release-notes-1.28.5]]
+==== 1.28.5 - 2024/08/28
+
+===== Bug fixes
+
+{pull}2430[#2430] Relax ECS container ID regex.
+
 [[release-notes-1.28.4]]
 ==== 1.28.4 - 2024/08/19
 
diff --git a/src/Elastic.Apm/Helpers/SystemInfoHelper.cs b/src/Elastic.Apm/Helpers/SystemInfoHelper.cs
index c737dbb11..b114cef9c 100644
--- a/src/Elastic.Apm/Helpers/SystemInfoHelper.cs
+++ b/src/Elastic.Apm/Helpers/SystemInfoHelper.cs
@@ -18,7 +18,7 @@ internal class SystemInfoHelper
 	{
 		private readonly Regex _containerUidRegex = new Regex("^[0-9a-fA-F]{64}$");
 		private readonly Regex _shortenedUuidRegex = new Regex("^[0-9a-fA-F]{8}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{4,}");
-		private readonly Regex _ecsContainerIdRegex = new Regex("^[a-z0-9]{32}-[0-9]{10}$");
+		private readonly Regex _ecsContainerIdRegex = new Regex("^[a-z0-9]{32}-[0-9]{1,10}$");
 		private readonly Regex _podRegex = new Regex(
 			@"(?:^/kubepods[\S]*/pod([^/]+)$)|(?:^/kubepods\.slice/(kubepods-[^/]+\.slice/)?kubepods[^/]*-pod([^/]+)\.slice$)");