diff --git a/.travis.yml b/.travis.yml
index d48c3c1..b6374ac 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,4 @@
 language: objective-c
 xcode_project: BeeHive.xcodeproj 
 xcode_scheme: BeeHive
-xcode_sdk: iphonesimulator
+xcode_destination: platform=iOS Simulator,OS=9.3,name=iPhone 5s
diff --git a/BeeHive.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/BeeHive.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/BeeHive.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/BeeHive/BHRouter.m b/BeeHive/BHRouter.m
index 611b811..c04c42c 100644
--- a/BeeHive/BHRouter.m
+++ b/BeeHive/BHRouter.m
@@ -69,7 +69,7 @@ + (id)bh_getReturnFromInv:(NSInvocation *)inv withSig:(NSMethodSignature *)sig {
         };
             
         case '@': { // id
-            id ret = nil;
+            __unsafe_unretained id ret = nil;
             [inv getReturnValue:&ret];
             return ret;
         };
@@ -247,69 +247,76 @@ + (BOOL)canOpenURL:(NSURL *)URL
     __block BOOL flag = YES;
     
     [pathComponents enumerateObjectsUsingBlock:^(NSString * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
-        NSArray<NSString *> * subPaths = [obj componentsSeparatedByString:BHRURLSubPathSplitPattern];
-        if (!subPaths.count) {
-            flag = NO;
-            *stop = NO;
-            return;
-        }
-        NSString *pathComponentKey = subPaths.firstObject;
-        if (router.pathComponentByKey[pathComponentKey]) {
-            return;
-        }
-        Class mClass = NSClassFromString(pathComponentKey);
-        if (!mClass) {
-            flag = NO;
-            *stop = NO;
-            return;
-        }
-        switch (usage) {
-            case BHRUsageCallService: {
-                if (subPaths.count < 3) {
-                    flag = NO;
-                    *stop = NO;
-                    return;
-                }
-                NSString *protocolStr = subPaths[1];
-                NSString *selectorStr = subPaths[2];
-                Protocol *protocol = NSProtocolFromString(protocolStr);
-                SEL selector = NSSelectorFromString(selectorStr);
-                if (!protocol ||
-                    !selector ||
-                    ![mClass conformsToProtocol:@protocol(BHServiceProtocol)] ||
-                    ![mClass conformsToProtocol:protocol] ||
-                    ![mClass instancesRespondToSelector:selector]) {
-                    flag = NO;
-                    *stop = NO;
-                    return;
-                }
-            } break;
-            case BHRUsageJumpViewControler: {
-                if (![mClass isSubclassOfClass:[UIViewController class]]) {
-                    flag = NO;
-                    *stop = NO;
-                    return;
-                }
-            } break;
-            case BHRUsageRegister: {
-                if (![mClass conformsToProtocol:@protocol(BHServiceProtocol)]) {
-                    return;
-                }
-                if (subPaths.count < 2) {
-                    flag = NO;
-                    *stop = NO;
-                    return;
-                }
-                NSString *protocolStr = subPaths[1];
-                Protocol *protocol = NSProtocolFromString(protocolStr);
-                if (!protocol || ![mClass conformsToProtocol:protocol]) {
-                    flag = NO;
-                    *stop = NO;
-                }
-            } break;
-                
-            default:
-                break;
+        
+        if (![obj isEqualToString:@"/"]) {
+            
+            NSArray<NSString *> * subPaths = [obj componentsSeparatedByString:BHRURLSubPathSplitPattern];
+            if (!subPaths.count) {
+                flag = NO;
+                *stop = NO;
+                return;
+            }
+            
+            NSString *pathComponentKey = subPaths.firstObject;
+            if (router.pathComponentByKey[pathComponentKey]) {
+                return;
+            }
+            
+            Class mClass = NSClassFromString(pathComponentKey);
+            if (!mClass) {
+                flag = NO;
+                *stop = NO;
+                return;
+            }
+            
+            switch (usage) {
+                case BHRUsageCallService: {
+                    if (subPaths.count < 3) {
+                        flag = NO;
+                        *stop = NO;
+                        return;
+                    }
+                    NSString *protocolStr = subPaths[1];
+                    NSString *selectorStr = subPaths[2];
+                    Protocol *protocol = NSProtocolFromString(protocolStr);
+                    SEL selector = NSSelectorFromString(selectorStr);
+                    if (!protocol ||
+                        !selector ||
+                        ![mClass conformsToProtocol:@protocol(BHServiceProtocol)] ||
+                        ![mClass conformsToProtocol:protocol] ||
+                        ![mClass instancesRespondToSelector:selector]) {
+                        flag = NO;
+                        *stop = NO;
+                        return;
+                    }
+                } break;
+                case BHRUsageJumpViewControler: {
+                    if (![mClass isSubclassOfClass:[UIViewController class]]) {
+                        flag = NO;
+                        *stop = NO;
+                        return;
+                    }
+                } break;
+                case BHRUsageRegister: {
+                    if (![mClass conformsToProtocol:@protocol(BHServiceProtocol)]) {
+                        return;
+                    }
+                    if (subPaths.count < 2) {
+                        flag = NO;
+                        *stop = NO;
+                        return;
+                    }
+                    NSString *protocolStr = subPaths[1];
+                    Protocol *protocol = NSProtocolFromString(protocolStr);
+                    if (!protocol || ![mClass conformsToProtocol:protocol]) {
+                        flag = NO;
+                        *stop = NO;
+                    }
+                } break;
+                    
+                default:
+                    break;
+            }
         }
     }];