diff --git a/Dockerfile b/Dockerfile
index e6fdeae..cad7685 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM wiiuenv/devkitppc:20220806
 
 COPY --from=wiiuenv/wiiumodulesystem:20220724 /artifacts $DEVKITPRO
-COPY --from=wiiuenv/wiiupluginsystem:20220724 /artifacts $DEVKITPRO
+COPY --from=wiiuenv/wiiupluginsystem:20220826 /artifacts $DEVKITPRO
 COPY --from=wiiuenv/libfunctionpatcher:20220724 /artifacts $DEVKITPRO
 COPY --from=wiiuenv/libmappedmemory:20220724 /artifacts $DEVKITPRO
 COPY --from=wiiuenv/libwupsbackend:20220724 /artifacts $DEVKITPRO
diff --git a/source/utils/StorageUtils.cpp b/source/utils/StorageUtils.cpp
index 8353554..58f9688 100644
--- a/source/utils/StorageUtils.cpp
+++ b/source/utils/StorageUtils.cpp
@@ -49,7 +49,7 @@ static void processJson(wups_storage_item_t *items, nlohmann::json json) {
     }
 }
 
-int StorageUtils::OpenStorage(const char *plugin_id, wups_storage_item_t *items) {
+WUPSStorageError StorageUtils::OpenStorage(const char *plugin_id, wups_storage_item_t *items) {
     if (!plugin_id || !items) {
         return WUPS_STORAGE_ERROR_INVALID_BACKEND_PARAMS;
     }
@@ -107,7 +107,7 @@ static nlohmann::json processItems(wups_storage_item_t *items) {
     return json;
 }
 
-int StorageUtils::CloseStorage(const char *plugin_id, wups_storage_item_t *items) {
+WUPSStorageError StorageUtils::CloseStorage(const char *plugin_id, wups_storage_item_t *items) {
     if (!plugin_id || !items) {
         return WUPS_STORAGE_ERROR_INVALID_BACKEND_PARAMS;
     }
diff --git a/source/utils/StorageUtils.h b/source/utils/StorageUtils.h
index 26c199c..46453fe 100644
--- a/source/utils/StorageUtils.h
+++ b/source/utils/StorageUtils.h
@@ -4,7 +4,7 @@
 
 class StorageUtils {
 public:
-    static int OpenStorage(const char *plugin_id, wups_storage_item_t *items);
+    static WUPSStorageError OpenStorage(const char *plugin_id, wups_storage_item_t *items);
 
-    static int CloseStorage(const char *plugin_id, wups_storage_item_t *items);
+    static WUPSStorageError CloseStorage(const char *plugin_id, wups_storage_item_t *items);
 };