I am hoping that the wisdom of the group here can at least point me in the right direction. I have a Centos7 server that I need to upgrade php from 5.4 to 5.5. I've tried several tutorials to add the remi repository and enable php55, but I always end up at the same result: Error: Package: php-5.5.38-1.el6.remi.x86_64 (remi-php55) Requires: httpd-mmn = 20051115 Installed: httpd-2.4.6-40.el7.centos.4.x86_64 (@updates) httpd-mmn = 20120211 httpd-mmn = 20120211x8664 httpd-mmn = 20120211-x86-64 Available: httpd-2.4.6-40.el7.centos.x86_64 (base) httpd-mmn = 20120211x8664 httpd-mmn = 20120211-x86-64 httpd-mmn = 20120211 Available: httpd-2.4.6-40.el7.centos.1.x86_64 (updates) httpd-mmn = 20120211x8664 httpd-mmn = 20120211-x86-64 httpd-mmn = 20120211 Error: Package: php-pecl-jsonc-1.3.10-1.el7.remi.5.4.x86_64 (remi) Requires: php(api) = 20100412-64 Removing: php-common-5.4.45-11.el7.remi.x86_64 (@remi) php(api) = 20100412-64 Updated By: php-common-5.5.38-1.el6.remi.x86_64 (remi-php55) php(api) = 20121113-64 Available: php-common-5.4.16-36.el7_1.x86_64 (base) php(api) = 20100412-64 Available: php-common-5.4.16-36.1.el7_2.1.x86_64 (updates) php(api) = 20100412-64 Available: php-common-5.4.16-36.3.el7_2.x86_64 (updates) php(api) = 20100412-64 Available: php-common-5.4.45-10.el7.remi.x86_64 (remi) php(api) = 20100412-64 Available: php-common-5.5.37-1.el6.remi.x86_64 (remi-php55) php(api) = 20121113-64 Error: Package: php-pecl-jsonc-1.3.10-1.el7.remi.5.4.x86_64 (remi) Requires: php(zend-abi) = 20100525-64 Removing: php-common-5.4.45-11.el7.remi.x86_64 (@remi) php(zend-abi) = 20100525-64 Updated By: php-common-5.5.38-1.el6.remi.x86_64 (remi-php55) php(zend-abi) = 20121212-64 Available: php-common-5.4.16-36.el7_1.x86_64 (base) php(zend-abi) = 20100525-64 Available: php-common-5.4.16-36.1.el7_2.1.x86_64 (updates) php(zend-abi) = 20100525-64 Available: php-common-5.4.16-36.3.el7_2.x86_64 (updates) php(zend-abi) = 20100525-64 Available: php-common-5.4.45-10.el7.remi.x86_64 (remi) php(zend-abi) = 20100525-64 Available: php-common-5.5.37-1.el6.remi.x86_64 (remi-php55) php(zend-abi) = 20121212-64 You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest If I try --skip-broken, I get: Packages skipped because of dependency problems: gd-last-2.2.3-1.el7.remi.x86_64 from remi libpng12-1.2.50-7.el7_2.x86_64 from updates libzip-last-1.1.3-1.el7.remi.x86_64 from remi php-5.5.38-1.el6.remi.x86_64 from remi-php55 php-cli-5.5.38-1.el6.remi.x86_64 from remi-php55 php-common-5.5.38-1.el6.remi.x86_64 from remi-php55 php-gd-5.5.38-1.el6.remi.x86_64 from remi-php55 php-mbstring-5.5.38-1.el6.remi.x86_64 from remi-php55 php-mcrypt-5.5.38-1.el6.remi.x86_64 from remi-php55 php-mysqlnd-5.5.38-1.el6.remi.x86_64 from remi-php55 php-pdo-5.5.38-1.el6.remi.x86_64 from remi-php55 php-pecl-jsonc-1.3.10-1.el7.remi.5.4.x86_64 from remi php-pecl-zip-1.13.4-1.el6.remi.5.5.x86_64 from remi-php55 php-process-5.5.38-1.el6.remi.x86_64 from remi-php55 php-xml-5.5.38-1.el6.remi.x86_64 from remi-php55 Error: Multilib version problems found. This often means that the root cause is something else and multilib version checking is just pointing out that there is a problem. Eg.: 1. You have an upgrade for php-common which is missing some dependency that another package requires. Yum is trying to solve this by installing an older version of php-common of the different architecture. If you exclude the bad architecture yum will tell you what the root cause is (which package requires what). You can try redoing the upgrade with --exclude php-common.otherarch ... this should give you an error message showing the root cause of the problem. 2. You have multiple architectures of php-common installed, but yum can only see an upgrade for one of those architectures. If you don't want/need both architectures anymore then you can remove the one with the missing update and everything will work. 3. You have duplicate versions of php-common installed already. You can use "yum check" to get yum show these errors. ...you can also use --setopt=protected_multilib=false to remove this checking, however this is almost never the correct thing to do as something else is very likely to go wrong (often causing much more problems). Protected multilib versions: php-common-5.5.37-1.el6.remi.x86_64 != php-common-5.4.45-11.el7.remi.x86_64