diff --git a/CITATION.cff b/CITATION.cff
index b9d3aab39..ff88bb62a 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -30,6 +30,6 @@ authors:
 - family-names: "Picheny"
   given-names: "Victor"
 title: "Trieste"
-version: 3.3.4
-date-released: 2024-07-15
+version: 3.4.0
+date-released: 2024-08-13
 url: "https://github.com/secondmind-labs/trieste"
diff --git a/trieste/VERSION b/trieste/VERSION
index a0891f563..18091983f 100644
--- a/trieste/VERSION
+++ b/trieste/VERSION
@@ -1 +1 @@
-3.3.4
+3.4.0
diff --git a/versions.json b/versions.json
index 00587f548..8e376fb6d 100644
--- a/versions.json
+++ b/versions.json
@@ -3,6 +3,10 @@
     "version": "develop",
     "url": "https://secondmind-labs.github.io/trieste/develop/"
   },
+  {
+    "version": "3.4.0",
+    "url": "https://secondmind-labs.github.io/trieste/3.4.0/"
+  },
   {
     "version": "3.3.4",
     "url": "https://secondmind-labs.github.io/trieste/3.3.4/"