diff --git a/src/session/mod.ts b/src/session/mod.ts
index 28748b4..dfd1f43 100644
--- a/src/session/mod.ts
+++ b/src/session/mod.ts
@@ -8,21 +8,24 @@ type SessionEntry<T extends unknown = unknown> = {
 
 export class SessionStore {
 	static #store = new Map<string, Session>()
+
+	static get maxAge() {
+		const halfHour = 30 * 60 * 1_000
+		return Date.now() - halfHour
+	}
 	static createSession(): Session {
 		return new Session(this.#store)
 	}
 
 	static getSession(uuid: string): Session | undefined {
 		// Check session validity
-		const halfHour = 30 * 60 * 1_000
-		const maxAge = Date.now() - halfHour
 		const session = this.#store.get(uuid)
 
 		if (session === undefined) {
 			return undefined
 		}
 
-		if (session.timestamp < maxAge) {
+		if (session.timestamp < this.maxAge) {
 			session.destroy()
 			return undefined
 		}