diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a4a980..f07832c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,12 @@ list yields a list of all related PRs for each release.
 
 # [unreleased]
 
+# [v5.5.1] 2023-09-12
+
+## Fixed
+
+- Some API usage fixes related to `tmtccmd` update.
+
 # [v5.5.0] 2023-09-12
 
 - Version is not specfied dynamically anymore and can be updated in `pyproject.toml`
diff --git a/pyproject.toml b/pyproject.toml
index 7c88b05..4c2633c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "eive-tmtc"
 description = "TMTC Commander EIVE"
 readme = "README.md"
-version = "5.5.0"
+version = "5.5.1"
 requires-python = ">=3.10"
 license = {text = "Apache-2.0"}
 authors = [