diff --git a/packages/server/src/server/agent/agent-manager.ts b/packages/server/src/server/agent/agent-manager.ts
index 214ddcce6..fdb9ac41b 100644
--- a/packages/server/src/server/agent/agent-manager.ts
+++ b/packages/server/src/server/agent/agent-manager.ts
@@ -278,7 +278,7 @@ type SubscriptionRecord = {
   agentId: string | null;
 };
 
-const BUSY_STATUSES: AgentLifecycleStatus[] = new Set(["initializing", "running"]);
+const BUSY_STATUSES: Set<AgentLifecycleStatus> = new Set(["initializing", "running"]);
 const AgentIdSchema = z.string().uuid();
 
 function isAgentBusy(status: AgentLifecycleStatus): boolean {
diff --git a/packages/server/src/server/logger.ts b/packages/server/src/server/logger.ts
index 76f85efd3..36c95376c 100644
--- a/packages/server/src/server/logger.ts
+++ b/packages/server/src/server/logger.ts
@@ -37,7 +37,7 @@ type ResolveLogConfigOptions = {
   env?: NodeJS.ProcessEnv;
 };
 
-const LOG_LEVELS: LogLevel[] = new Set(["trace", "debug", "info", "warn", "error", "fatal"]);
+const LOG_LEVELS: Set<LogLevel> = new Set(["trace", "debug", "info", "warn", "error", "fatal"]);
 const LOG_FORMATS: LogFormat[] = ["pretty", "json"];
 const LOG_LEVEL_PRIORITIES: Record<LogLevel, number> = {
   trace: 10,
diff --git a/packages/server/tsconfig.server.json b/packages/server/tsconfig.server.json
index c846e8484..eca3cd0da 100644
--- a/packages/server/tsconfig.server.json
+++ b/packages/server/tsconfig.server.json
@@ -3,7 +3,7 @@
     "target": "ES2020",
     "module": "NodeNext",
     "moduleResolution": "NodeNext",
-    "lib": ["ES2020", "DOM"],
+    "lib": ["ES2023", "DOM"],
     "baseUrl": "./src",
     "paths": {
       "@server/*": ["./*"]
diff --git a/tsconfig.base.json b/tsconfig.base.json
index fe84a6012..6c68b1ccd 100644
--- a/tsconfig.base.json
+++ b/tsconfig.base.json
@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "target": "ES2020",
-    "lib": ["ES2020"],
+    "lib": ["ES2023"],
     "module": "ESNext",
     "moduleResolution": "bundler",
     "strict": true,