diff --git a/requirements.txt b/requirements.txt
index 61066a1..e5ed061 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -49,7 +49,7 @@ Pygments==2.1.3
 pyparsing==2.1.10                                                                                           
 python-dateutil==2.6.0                                                                                      
 pytz==2016.7                                                                                                
-PyYAML==3.12                                                                                                
+PyYAML==5.4                                                                                                
 pyzmq==16.0.0                                                                                               
 qtconsole==4.2.1                                                                                            
 requests==2.2.1