diff --git a/doric-iOS/Pod/Classes/Engine/DoricJSEngine.m b/doric-iOS/Pod/Classes/Engine/DoricJSEngine.m
index cf768fcb..5358d0c9 100644
--- a/doric-iOS/Pod/Classes/Engine/DoricJSEngine.m
+++ b/doric-iOS/Pod/Classes/Engine/DoricJSEngine.m
@@ -127,9 +127,13 @@ - (void)initJSExecutor {
 
 - (void)initDoricEnvironment {
     @try {
-
         [self loadBuiltinJS:DORIC_BUNDLE_SANDBOX];
-        NSString *path = [DoricBundle() pathForResource:DORIC_BUNDLE_LIB ofType:@"js"];
+        NSString *path;
+        if (@available(iOS 10.0, *)) {
+            path = [DoricBundle() pathForResource:DORIC_BUNDLE_LIB ofType:@"js"];
+        } else {
+            path = [DoricBundle() pathForResource:[NSString stringWithFormat:@"%@.es5", DORIC_BUNDLE_LIB] ofType:@"js"];
+        }
         NSString *jsContent = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
         [self.jsExecutor loadJSScript:[self packageModuleScript:DORIC_MODULE_LIB content:jsContent]
                                source:[@"Module://" stringByAppendingString:DORIC_MODULE_LIB]];
@@ -139,7 +143,12 @@ - (void)initDoricEnvironment {
 }
 
 - (void)loadBuiltinJS:(NSString *)fileName {
-    NSString *path = [DoricBundle() pathForResource:DORIC_BUNDLE_SANDBOX ofType:@"js"];
+    NSString *path;
+    if (@available(iOS 10.0, *)) {
+        path = [DoricBundle() pathForResource:DORIC_BUNDLE_SANDBOX ofType:@"js"];
+    } else {
+        path = [DoricBundle() pathForResource:[NSString stringWithFormat:@"%@.es5", DORIC_BUNDLE_SANDBOX] ofType:@"js"];
+    }
     NSString *jsContent = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
     [self.jsExecutor loadJSScript:jsContent source:[@"Assets://" stringByAppendingString:fileName]];
 }