diff --git a/api.planx.uk/package.json b/api.planx.uk/package.json
index cddb088baa..a94bc6e1ff 100644
--- a/api.planx.uk/package.json
+++ b/api.planx.uk/package.json
@@ -46,7 +46,7 @@
     "swagger-jsdoc": "^6.2.8",
     "swagger-ui-express": "^5.0.0",
     "type-fest": "^4.18.1",
-    "zod": "^3.22.4"
+    "zod": "^3.23.5"
   },
   "scripts": {
     "dev": "ts-node-dev --files index.ts",
diff --git a/api.planx.uk/pnpm-lock.yaml b/api.planx.uk/pnpm-lock.yaml
index 52894bb29b..329acc4c9c 100644
--- a/api.planx.uk/pnpm-lock.yaml
+++ b/api.planx.uk/pnpm-lock.yaml
@@ -138,8 +138,8 @@ dependencies:
     specifier: ^4.18.1
     version: 4.18.1
   zod:
-    specifier: ^3.22.4
-    version: 3.22.4
+    specifier: ^3.23.5
+    version: 3.23.5
 
 devDependencies:
   '@babel/core':
@@ -8420,10 +8420,6 @@ packages:
       commander: 9.5.0
     dev: false
 
-  /zod@3.22.4:
-    resolution: {integrity: sha512-iC+8Io04lddc+mVqQ9AZ7OQ2MrUKGN+oIQyq1vemgt46jwCwLfhq7/pwnBnNXXXZb8VTVLKwp9EDkx+ryxIWmg==}
-    dev: false
-
   /zod@3.23.5:
     resolution: {integrity: sha512-fkwiq0VIQTksNNA131rDOsVJcns0pfVUjHzLrNBiF/O/Xxb5lQyEXkhZWcJ7npWsYlvs+h0jFWXXy4X46Em1JA==}
     dev: false