diff --git a/package.json b/package.json
index 8584c1c..9c85ae8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@anduril-industries/lattice-sdk",
-    "version": "3.0.0",
+    "version": "4.0.0",
     "private": false,
     "repository": "github:anduril/lattice-sdk-javascript",
     "license": "See LICENSE",
diff --git a/src/Client.ts b/src/Client.ts
index 483efe7..78607c3 100644
--- a/src/Client.ts
+++ b/src/Client.ts
@@ -26,8 +26,8 @@ export class LatticeClient {
                 {
                     "X-Fern-Language": "JavaScript",
                     "X-Fern-SDK-Name": "@anduril-industries/lattice-sdk",
-                    "X-Fern-SDK-Version": "3.0.0",
-                    "User-Agent": "@anduril-industries/lattice-sdk/3.0.0",
+                    "X-Fern-SDK-Version": "4.0.0",
+                    "User-Agent": "@anduril-industries/lattice-sdk/4.0.0",
                     "X-Fern-Runtime": core.RUNTIME.type,
                     "X-Fern-Runtime-Version": core.RUNTIME.version,
                 },
diff --git a/src/version.ts b/src/version.ts
index b54c0db..c8a6ab3 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const SDK_VERSION = "2.5.0";
+export const SDK_VERSION = "4.0.0";