diff --git a/NEWS b/NEWS
index dfa54bfc..cae76207 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,7 @@
+* Version 5.5.1 (released 2024-07-01)
+ * Bugfix: CLI - Don't use formatting that doesn't work on older Python versions.
+   Note: As the 5.5.0 installers bundle Python 3.12, this will be a source-only release.
+
 * Version 5.5.0 (released 2024-06-26)
  * Add Secure Channel support to smartcard sessions.
  * Support extended APDUs in the "apdu" command (this is now the default).
diff --git a/pyproject.toml b/pyproject.toml
index fc7c05db..15d29df9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "yubikey-manager"
-version = "5.5.1-dev.0"
+version = "5.5.1"
 description = "Tool for managing your YubiKey configuration."
 authors = ["Dain Nilsson <dain@yubico.com>"]
 license = "BSD"
diff --git a/ykman/__init__.py b/ykman/__init__.py
index 4d981e66..5c4a7d04 100644
--- a/ykman/__init__.py
+++ b/ykman/__init__.py
@@ -25,4 +25,4 @@
 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 # POSSIBILITY OF SUCH DAMAGE.
 
-__version__ = "5.5.1-dev.0"
+__version__ = "5.5.1"