diff --git a/CHANGES.md b/CHANGES.md
index 51a03b4a..b4962abe 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -12,6 +12,12 @@ $ towncrier create <PR-number>.<break|feat|fix>.md --content "Short description"
 
 <!-- towncrier release notes start -->
 
+## cylc-uiserver-1.4.3 (Released 2023-12-05)
+
+### 🔧 Fixes
+
+[#533](https://github.com/cylc/cylc-uiserver/pull/533) - Fixed bug introduced in 1.4.2 where playing a workflow would fail if using a Cylc environment whose name does not match `cylc-8.X.Y` exactly.
+
 ## cylc-uiserver-1.4.2 (Released 2023-11-29)
 
 [Updated cylc-ui to 2.3.0](https://github.com/cylc/cylc-ui/blob/master/CHANGES.md)
diff --git a/changes.d/533.fix.md b/changes.d/533.fix.md
deleted file mode 100644
index 01af0f5c..00000000
--- a/changes.d/533.fix.md
+++ /dev/null
@@ -1 +0,0 @@
-Fixed bug introduced in 1.4.2 where playing a workflow would fail if using a Cylc environment whose name does not match `cylc-8.X.Y` exactly.
diff --git a/cylc/uiserver/__init__.py b/cylc/uiserver/__init__.py
index 53555760..ed5287a4 100644
--- a/cylc/uiserver/__init__.py
+++ b/cylc/uiserver/__init__.py
@@ -13,7 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-__version__ = "1.4.3.dev"
+__version__ = "1.4.3"
 
 import os
 from typing import Dict