diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3d412cf..1ecfed6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Changed
+
+- Updated l9format requirement from =1.3.2 to =1.4.0 ([ae676d9])
+
 ## [0.1.10] - 2024-12-XX
 
 ### Changed
@@ -43,6 +47,7 @@ and this project adheres to
 [0.1.9]: https://github.com/LeakIX/LeakIXClient-Python/releases/tag/v0.1.9
 
 <!-- Commit links -->
+[ae676d9]: https://github.com/LeakIX/LeakIXClient-Python/commit/ae676d9
 [65c5121]: https://github.com/LeakIX/LeakIXClient-Python/commit/65c5121
 [0975c1c]: https://github.com/LeakIX/LeakIXClient-Python/commit/0975c1c
 [7cb5dae]: https://github.com/LeakIX/LeakIXClient-Python/commit/7cb5dae
diff --git a/pyproject.toml b/pyproject.toml
index 3a68660..429577a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ authors = ["Danny Willems <danny@leakix.net>"]
 [tool.poetry.dependencies]
 python = "^3.13"
 requests = "*"
-l9format = "=1.3.2"
+l9format = "=1.4.0"
 fire = ">=0.5,<0.8"
 
 [tool.poetry.group.dev.dependencies]