How to fix “Your Ruby version is 2.3.0, but your Gemfile specified 2.2.5” while server starting

Question

I am getting this error while running server, how do I fix this?

Answer 1

Your Gemfile has a line reading

ruby '2.2.5'

Change it to

ruby '2.3.0'

Then run

bundle install

Answer 2

For $ Your Ruby version is 2.3.0, but your Gemfile specified 2.4.1. Changed 2.4.1 in Gemfile to 2.3.0

Answer 3

You better install Ruby 2.2.5 for compatibility. The Ruby version in your local machine is different from the one declared in Gemfile.

If you're using rvm:

rvm install 2.2.5
rvm use 2.2.5

else if you're using rbenv:

rbenv install 2.2.5
rbenv local 2.2.5

else if you can not change ruby version by rbenv, read here

Answer 4

If you have already installed 2.2.5 and set as current ruby version, but still showing the same error even if the Ruby version 2.3.0 is not even installed, then just install the bundler.

gem install bundler

and then:

bundle install

Answer 5

I am on Mac OS Sierra. I had to update /etc/paths and add /Users/my.username/.rbenv/shims to the top of the list.

Answer 6

it can also be in your capistrano config (Capfile):

set :rbenv_ruby, "2.7.1"