diff --git a/README.md b/README.md
index fa26b72591..29d2eadf7d 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ The tool dispatches and runs trial jobs generated by tuning algorithms to search
 **Install through pip** 	
 * We only support Linux in current stage, Ubuntu 16.04 or higher are tested and supported. Simply run the following `pip install` in an environment that has `python >= 3.5`.	
 ```bash	
-    python3 -m pip install --user nni
+    python3 -m pip install --user --upgrade nni
 ```
 
 **Install through source code**
diff --git a/examples/trials/ga_squad/config.yml b/examples/trials/ga_squad/config.yml
index c6fec5bcbc..e276f0633c 100644
--- a/examples/trials/ga_squad/config.yml
+++ b/examples/trials/ga_squad/config.yml
@@ -8,7 +8,7 @@ trainingServicePlatform: local
 #choice: true, false
 useAnnotation: false
 tuner:
-  codeDir: ../tuners/ga_customer_tuner
+  codeDir: ../../tuners/ga_customer_tuner
   classFileName: customer_tuner.py
   className: CustomerTuner
   classArgs:
@@ -16,4 +16,4 @@ tuner:
 trial:
   command: python3 trial.py
   codeDir: .
-  gpuNum: 0
\ No newline at end of file
+  gpuNum: 0