diff --git a/src/main/java/com/back/global/rq/Rq.java b/src/main/java/com/back/global/rq/Rq.java
index 72f02868..28167eb2 100644
--- a/src/main/java/com/back/global/rq/Rq.java
+++ b/src/main/java/com/back/global/rq/Rq.java
@@ -31,6 +31,9 @@ public class Rq {
     @Value("${custom.cookie.same}")
     private String cookieSameSite;
 
+    @Value("${custom.site.cookieDomain}")
+    private String cookieDomain;
+
 
     public User getActor() {
         return Optional.ofNullable(
@@ -95,6 +98,7 @@ public void setCrossDomainCookie(String name, String value, int maxAge) {
                 .maxAge(maxAge)
                 .secure(cookieSecure)
                 .sameSite(cookieSameSite)
+                .domain(cookieDomain)
                 .httpOnly(true)
                 .build();
         resp.addHeader("Set-Cookie", cookie.toString());
diff --git a/src/main/resources/application-dev.yml b/src/main/resources/application-dev.yml
index 28ebf512..0bbfc94d 100644
--- a/src/main/resources/application-dev.yml
+++ b/src/main/resources/application-dev.yml
@@ -58,7 +58,7 @@ logging:
 # 쿠키 보안 설정 (HTTP 환경용)
 custom:
   cookie:
-    secure: true
+    secure: false
     same: "Lax"
 
 #  # AI 설정
diff --git a/src/main/resources/application-prod.yml b/src/main/resources/application-prod.yml
index 423e9a4a..06dbe374 100644
--- a/src/main/resources/application-prod.yml
+++ b/src/main/resources/application-prod.yml
@@ -44,8 +44,8 @@ custom:
   cookie:
     secure: true
     same: "None"
-    domain: ${custom.prod.cookieDomain}
   site:
+    cookieDomain: ".${BASE_URL}"
     frontUrl: "${custom.prod.frontUrl}"
     backUrl: "${custom.prod.backUrl}"
     name: ssoul