diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe32e9e..da4821b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and adheres to a project-specific [Versioning](/README.md).
 
 ## [Unreleased]
 
+### Changed
+
+- Updated `S1133` to `suggestion`, because while we do want deprecated code to be removed eventually, marking code as obsolete should not immediately break the build.
+
 ## [3.1.0] - 2024-09-19
 
 ### Fixed
diff --git a/build/Neolution.CodeAnalysis.globalconfig b/build/Neolution.CodeAnalysis.globalconfig
index de091b4..8fd6179 100644
--- a/build/Neolution.CodeAnalysis.globalconfig
+++ b/build/Neolution.CodeAnalysis.globalconfig
@@ -250,6 +250,10 @@ dotnet_diagnostic.S3267.severity = suggestion
 ; Developers should be warned when they create disposable objects without disposing them
 dotnet_diagnostic.CA2000.severity = warning
 
+# S1133	Do not forget to remove this deprecated code someday.
+; Deprecated code should eventually be removed, but it should not break the current build.
+dotnet_diagnostic.S1133.severity = suggestion
+
 # S107: Methods should not have too many parameters
 dotnet_diagnostic.S107.severity = warning