diff --git a/examples/jq.ts b/examples/jq.ts
index 797d943..fb95391 100755
--- a/examples/jq.ts
+++ b/examples/jq.ts
@@ -8,7 +8,6 @@ async function main() {
   const substrate = new Substrate({
     apiKey: SUBSTRATE_API_KEY,
     baseUrl: "https://api.substrate.run",
-    backend: "v1",
   });
 
   const a = new GenerateJSON({
diff --git a/examples/kitchen-sink.ts b/examples/kitchen-sink.ts
index a33ba7f..8fd2e97 100755
--- a/examples/kitchen-sink.ts
+++ b/examples/kitchen-sink.ts
@@ -570,7 +570,6 @@ async function main() {
       const substrate = new Substrate({
         apiKey: SUBSTRATE_API_KEY,
         baseUrl: env.url.value,
-        backend: env.backend.value,
       });
       const tag = `[${env.url.name}:${env.backend.value}]`;
 
diff --git a/examples/large-run.ts b/examples/large-run.ts
index 793818d..2fc0c0b 100755
--- a/examples/large-run.ts
+++ b/examples/large-run.ts
@@ -8,7 +8,6 @@ async function main() {
   const substrate = new Substrate({
     apiKey: SUBSTRATE_API_KEY,
     baseUrl: "https://api-staging.substrate.run",
-    backend: "v1",
   });
 
   let nodes = [];
diff --git a/src/Substrate.ts b/src/Substrate.ts
index c38c770..2e82718 100644
--- a/src/Substrate.ts
+++ b/src/Substrate.ts
@@ -26,11 +26,6 @@ type Configuration = {
    */
   timeout?: number;
 
-  /**
-   * Switches between existing backend and newer backend
-   */
-  backend?: "v0" | "v1";
-
   /**
    * Add additional headers to each request. These may override headers set by the Substrate client.
    */
@@ -45,7 +40,6 @@ export class Substrate {
   baseUrl: NonNullable<Configuration["baseUrl"]>;
   apiVersion: NonNullable<Configuration["apiVersion"]>;
   timeout: NonNullable<Configuration["timeout"]>;
-  backend: NonNullable<Configuration["backend"]>;
   additionalHeaders: NonNullable<Configuration["additionalHeaders"]>;
 
   /**
@@ -56,7 +50,6 @@ export class Substrate {
     baseUrl,
     apiVersion,
     timeout,
-    backend,
     additionalHeaders,
   }: Configuration) {
     if (!apiKey) {
@@ -68,7 +61,6 @@ export class Substrate {
     this.baseUrl = baseUrl ?? "https://api.substrate.run";
     this.apiVersion = apiVersion ?? OpenAPIjson["info"]["version"];
     this.timeout = timeout ?? 300_000;
-    this.backend = backend ?? "v1";
     this.additionalHeaders = additionalHeaders ?? {};
   }
 
@@ -235,7 +227,6 @@ export class Substrate {
     headers.append("Content-Type", "application/json");
     headers.append("User-Agent", `APIClient/JS ${VERSION}`);
     headers.append("X-Substrate-Version", this.apiVersion);
-    headers.append("X-Substrate-Backend", this.backend); // Switch between old and new backends
     headers.append("X-Substrate-Request-Id", randomString(32));
 
     // Auth