diff --git a/nise-backend/src/main/kotlin/com/nisemoe/nise/config/SecurityConfig.kt b/nise-backend/src/main/kotlin/com/nisemoe/nise/config/SecurityConfig.kt
index 1b080bf..838f08b 100644
--- a/nise-backend/src/main/kotlin/com/nisemoe/nise/config/SecurityConfig.kt
+++ b/nise-backend/src/main/kotlin/com/nisemoe/nise/config/SecurityConfig.kt
@@ -35,7 +35,7 @@ class SecurityConfig {
         serializer.setCookieName("SESSION")
         serializer.setCookiePath("/")
         serializer.setDomainNamePattern(domainNamePattern)
-        serializer.setCookieMaxAge(TimeUnit.DAYS.toSeconds(30).toInt())
+        serializer.setCookieMaxAge(TimeUnit.DAYS.toSeconds(90).toInt())
         serializer.setUseHttpOnlyCookie(cookieSecure)
         serializer.setUseSecureCookie(cookieSecure)