diff --git a/.stats.yml b/.stats.yml
index 5202b82..0ade444 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 52
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/julep-ai-inc-dash%2Fjulep-d71538f9a51a6eb7e007d2c463aa461809ce549dbd48ab4e657d0207fa5c4971.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/julep-ai-inc-dash%2Fjulep-854c2437e2f6b49e41fc38c9db2140054af2cf27a80452a3947189d7bac3af27.yml
diff --git a/src/resources/agents/agents.ts b/src/resources/agents/agents.ts
index 10860b8..1fe0796 100644
--- a/src/resources/agents/agents.ts
+++ b/src/resources/agents/agents.ts
@@ -107,6 +107,8 @@ export interface Agent {
 
   default_settings?: unknown | null;
 
+  default_system_template?: string;
+
   instructions?: string | Array<string>;
 
   metadata?: unknown | null;
@@ -123,6 +125,8 @@ export interface AgentCreateParams {
 
   default_settings?: unknown | null;
 
+  default_system_template?: string;
+
   instructions?: string | Array<string>;
 
   metadata?: unknown | null;
@@ -137,6 +141,8 @@ export interface AgentUpdateParams {
 
   default_settings?: unknown | null;
 
+  default_system_template?: string;
+
   instructions?: string | Array<string>;
 
   metadata?: unknown | null;
@@ -163,6 +169,8 @@ export interface AgentCreateOrUpdateParams {
 
   default_settings?: unknown | null;
 
+  default_system_template?: string;
+
   instructions?: string | Array<string>;
 
   metadata?: unknown | null;
@@ -179,6 +187,8 @@ export interface AgentResetParams {
 
   default_settings?: unknown | null;
 
+  default_system_template?: string;
+
   instructions?: string | Array<string>;
 
   metadata?: unknown | null;
diff --git a/src/resources/sessions.ts b/src/resources/sessions.ts
index fcef8cf..92d3e3c 100644
--- a/src/resources/sessions.ts
+++ b/src/resources/sessions.ts
@@ -4304,7 +4304,7 @@ export interface Session {
 
   summary?: string | null;
 
-  system_template?: string;
+  system_template?: string | null;
 
   token_budget?: number | null;
 }
@@ -4764,7 +4764,7 @@ export interface SessionCreateParams {
 
   situation?: string | null;
 
-  system_template?: string;
+  system_template?: string | null;
 
   token_budget?: number | null;
 
@@ -4810,7 +4810,7 @@ export interface SessionUpdateParams {
 
   situation?: string | null;
 
-  system_template?: string;
+  system_template?: string | null;
 
   token_budget?: number | null;
 }
@@ -5872,7 +5872,7 @@ export interface SessionCreateOrUpdateParams {
 
   situation?: string | null;
 
-  system_template?: string;
+  system_template?: string | null;
 
   token_budget?: number | null;
 
@@ -5918,7 +5918,7 @@ export interface SessionResetParams {
 
   situation?: string | null;
 
-  system_template?: string;
+  system_template?: string | null;
 
   token_budget?: number | null;
 }
diff --git a/tests/api-resources/agents/agents.test.ts b/tests/api-resources/agents/agents.test.ts
index e5b6b43..9d67328 100644
--- a/tests/api-resources/agents/agents.test.ts
+++ b/tests/api-resources/agents/agents.test.ts
@@ -26,6 +26,7 @@ describe('resource agents', () => {
       about: 'about',
       canonical_name: 'canonical_name',
       default_settings: {},
+      default_system_template: 'default_system_template',
       instructions: 'string',
       metadata: {},
       model: 'model',
@@ -108,6 +109,7 @@ describe('resource agents', () => {
       about: 'about',
       canonical_name: 'canonical_name',
       default_settings: {},
+      default_system_template: 'default_system_template',
       instructions: 'string',
       metadata: {},
       model: 'model',
@@ -149,6 +151,7 @@ describe('resource agents', () => {
       about: 'about',
       canonical_name: 'canonical_name',
       default_settings: {},
+      default_system_template: 'default_system_template',
       instructions: 'string',
       metadata: {},
       model: 'model',