diff --git a/Runtime/ClassicalUsages/ServiceContainer.cs b/Runtime/ClassicalUsages/ServiceContainer.cs
index 1d02799..462aa69 100644
--- a/Runtime/ClassicalUsages/ServiceContainer.cs
+++ b/Runtime/ClassicalUsages/ServiceContainer.cs
@@ -90,13 +90,16 @@ static Info GetInfoWithCache(Type desiredType, Type declaringType)
             Info info;
             if (lutInfos.TryGetValue((desiredType, declaringType), out info)) return info; // first in order
 
-            foreach (var interfType in declaringType.GetInterfaces())
+            if (declaringType != null)
             {
-                if (lutInfos.TryGetValue((desiredType, interfType), out info)) return info;
-            }
-            for (var curType = declaringType.BaseType; curType != null; curType = curType.BaseType)
-            {
-                if (lutInfos.TryGetValue((desiredType, curType), out info)) return info;
+                foreach (var interfType in declaringType.GetInterfaces())
+                {
+                    if (lutInfos.TryGetValue((desiredType, interfType), out info)) return info;
+                }
+                for (var curType = declaringType.BaseType; curType != null; curType = curType.BaseType)
+                {
+                    if (lutInfos.TryGetValue((desiredType, curType), out info)) return info;
+                }
             }
 
             if (lutInfos.TryGetValue((desiredType, null), out info)) return info; // default cache
diff --git a/package.json b/package.json
index c64067a..aa79b53 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "com.bbbirder.injection",
   "displayName": "Unity Injection",
   "description": "Unity注入模块，可以运行时改变被注入函数实现。",
-  "version": "1.3.17",
+  "version": "1.3.18",
   "hideInEditor": false,
   "author": "bbbirder <502100554@qq.com>",
   "dependencies": {