diff --git a/CITATION.cff b/CITATION.cff
index 489bdd2cf..5003fe81d 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -30,6 +30,6 @@ authors:
 - family-names: "Picheny"
   given-names: "Victor"
 title: "Trieste"
-version: 4.2.3
-date-released: 2025-01-20
+version: 4.2.4
+date-released: 2025-01-21
 url: "https://github.com/secondmind-labs/trieste"
diff --git a/trieste/VERSION b/trieste/VERSION
index f2c6cb6af..cf78d5b6a 100644
--- a/trieste/VERSION
+++ b/trieste/VERSION
@@ -1 +1 @@
-4.2.3
+4.2.4
diff --git a/versions.json b/versions.json
index b190b1c4c..88b530602 100644
--- a/versions.json
+++ b/versions.json
@@ -4,8 +4,8 @@
     "url": "https://secondmind-labs.github.io/trieste/develop/"
   },
   {
-    "version": "4.2.3",
-    "url": "https://secondmind-labs.github.io/trieste/4.2.3/"
+    "version": "4.2.4",
+    "url": "https://secondmind-labs.github.io/trieste/4.2.4/"
   },
   {
     "version": "4.1.0",