diff --git a/backend/build.gradle b/backend/build.gradle
index 73a8d92e..7ae32609 100644
--- a/backend/build.gradle
+++ b/backend/build.gradle
@@ -27,7 +27,7 @@ repositories {
 
 // Spring AI BOM for dependency management
 ext {
-    springAiVersion = '1.1.6'
+    springAiVersion = '1.1.7'
     // セキュリティ修正: Spring Boot 管理下の推移的依存をパッチ版へ上書き（Dependabot 対応）
     set('tomcat.version', '10.1.55')        // CVE: GHSA-5m62-pw8w-7w9f 他 (Critical)
     set('netty.version', '4.1.133.Final')   // CVE: GHSA-57rv-r2g8-2cj3 他 (High)
@@ -37,7 +37,7 @@ dependencyManagement {
     imports {
         // 順序重要: 後に宣言した BOM が優先される
         // spring-cloud-gcp が古い google-cloud-vertexai を引き込むため、spring-ai-bom を後に配置
-        mavenBom "com.google.cloud:spring-cloud-gcp-dependencies:7.4.6"
+        mavenBom "com.google.cloud:spring-cloud-gcp-dependencies:7.4.9"
         mavenBom "org.springframework.ai:spring-ai-bom:${springAiVersion}"
     }
 }
@@ -73,8 +73,8 @@ dependencies {
     }
     implementation 'commons-io:commons-io:2.22.0'
     implementation 'org.freemarker:freemarker:2.3.34'
-    implementation 'com.codeborne:selenide:7.16.1'
-    implementation 'org.hibernate.orm:hibernate-core:6.6.50.Final'
+    implementation 'com.codeborne:selenide:7.16.2'
+    implementation 'org.hibernate.orm:hibernate-core:6.6.52.Final'
     // implementation 'jakarta.servlet:jakarta.servlet-api:5.0.0' // Managed by Spring Boot
     implementation 'jakarta.validation:jakarta.validation-api:3.1.1'
     implementation 'jakarta.persistence:jakarta.persistence-api:3.1.0' // 3.2.xはHibernate 7.0向け、Spring Boot 3.xは3.1.xが必要
@@ -83,7 +83,7 @@ dependencies {
     // Redis (分散レート制限・セッション管理)
     implementation 'org.springframework.boot:spring-boot-starter-data-redis:3.5.14'
     // lettuce-core: Spring Bootの依存関係管理に任せる（6.3.xはSpring Boot 3.5+と互換性なし）
-    implementation 'io.hypersistence:hypersistence-utils-hibernate-63:3.15.2'
+    implementation 'io.hypersistence:hypersistence-utils-hibernate-63:3.15.3'
     
     // Azure Communication Services (メール送信)
     implementation 'com.azure:azure-communication-email:1.1.3'
@@ -124,7 +124,7 @@ dependencies {
     implementation 'com.google.cloud:spring-cloud-gcp-starter-storage'
 
     // AWS SDK for S3 (Cloudflare R2 互換)
-    implementation platform('software.amazon.awssdk:bom:2.45.1')
+    implementation platform('software.amazon.awssdk:bom:2.46.4')
     implementation 'software.amazon.awssdk:s3'
     
     annotationProcessor 'org.springframework.boot:spring-boot-configuration-processor'