diff --git a/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/CollectionCacheStore.java b/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/CollectionCacheStore.java
index 338d85a..ec7baf0 100644
--- a/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/CollectionCacheStore.java
+++ b/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/CollectionCacheStore.java
@@ -24,7 +24,7 @@ import java.util.Collection;
  * @param <E> 元素类型.
  * @author LamGC
  */
-public interface CollectionCacheStore<E> extends CacheStore<Collection<E>> {
+public interface CollectionCacheStore<E, C extends Collection<E>> extends CacheStore<C> {
 
     /**
      * 为缓存项添加一个元素.
diff --git a/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/ListCacheStore.java b/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/ListCacheStore.java
index cae4923..8fa6642 100644
--- a/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/ListCacheStore.java
+++ b/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/ListCacheStore.java
@@ -25,7 +25,7 @@ import java.util.List;
  * @param <E> 值类型.
  * @author LamGC
  */
-public interface ListCacheStore<E> extends CollectionCacheStore<E> {
+public interface ListCacheStore<E> extends CollectionCacheStore<E, List<E>> {
 
     /**
      * 获取缓存项中的指定元素.
diff --git a/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/SetCacheStore.java b/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/SetCacheStore.java
index 0299125..6231a2a 100644
--- a/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/SetCacheStore.java
+++ b/ContentGrabbingJi-CacheStore-api/src/main/java/net/lamgc/cgj/bot/cache/SetCacheStore.java
@@ -24,7 +24,7 @@ import java.util.Set;
  * @param <E> 值类型.
  * @author LamGC
  */
-public interface SetCacheStore<E> extends CollectionCacheStore<E> {
+public interface SetCacheStore<E> extends CollectionCacheStore<E, Set<E>> {