There is a new patch 22.214.171.124 or apply the patch SUPEE-8167.
For PayPal, this patch must be installed before June 30, 2017. It enables https for the IPN connection.
If you have errors during the upgrade :
Error: upgrade-all: Failed to delete files: /home/data/www/magento_docker/./pkginfo/Mage_All_Latest.txt Check permissions Error: upgrade-all: Package community/Interface_Adminhtml_Default 126.96.36.199 conflicts with: community/Mage_All_Latest 188.8.131.52 Error: upgrade-all: Package community/Interface_Frontend_Default 184.108.40.206 conflicts with: community/Mage_All_Latest 220.127.116.11 ...
you can check my previous article : Magento 1.9.3 : Security patch SUPEE-8788