diff --git a/CHANGELOG.md b/CHANGELOG.md
index 54cc58f..ee88568 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 # Changelog
 
 ## Pending
+### Changed
+- Support scout-apm 4.x (#35)
+
 ## [1.0.3] 2025-12-15
 ### Fixed
 - Shared logger provider being closed prematurely (#32)
diff --git a/pyproject.toml b/pyproject.toml
index ccf038b..f4bfda5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@ python = "^3.10"
 opentelemetry-api = "^1.26.0"
 opentelemetry-sdk = "^1.26.0"
 opentelemetry-exporter-otlp = "^1.26.0"
-scout-apm = "^3.1.0"
+scout-apm = ">=3.1.0,<5.0.0"
 
 
 [tool.poetry.group.dev.dependencies]