diff --git a/introduction/lab_code/test.py b/introduction/lab_code/test.py
index 71eda687..823b0239 100644
--- a/introduction/lab_code/test.py
+++ b/introduction/lab_code/test.py
@@ -17,7 +17,7 @@
 '''
 import yaml, subprocess
 stream = open('/home/fox/test.yaml', 'r')
-data = yaml.load(stream)
+data = yaml.load(stream, Loader=yaml.SafeLoader)
 
 '''
 stdout, stderr = data.communicate()
@@ -26,4 +26,4 @@
 '''
 print(data + "\n")
 # print(stdout + "\n")
-# print(stderr + "\n")
\ No newline at end of file
+# print(stderr + "\n")