diff --git a/examples/tfb/requirements.txt b/examples/tfb/requirements.txt
index 065eecbfc..bbe46a812 100644
--- a/examples/tfb/requirements.txt
+++ b/examples/tfb/requirements.txt
@@ -16,7 +16,7 @@ psycopg2==2.7.7
 pycrypto==2.6.1
 PyHamcrest==1.9.0
 pytz==2018.9
-PyYAML==4.2b4
+PyYAML==5.4
 six==1.12.0
 slimit==0.8.1
 spyne==2.13.9a0