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

Add the following to your Gemfile

ruby '2.3.0'

Answer 2

I had this problem but I solved it by installing the version of the ruby that is specified in my gem file using the RVM

    rvm install (ruby version)

After the installation, I use the following command to use the the version that you installed.

    rvm --default use (ruby version)

You have to install bundler by using the following command in order to use the latest version

    gem install bundler 

After the above steps, you can now run following command to install the gems specified on the gemfile

    bundle install

Answer 3

Two steps worked for me:

gem install bundler

bundle install --redownload # Forces a redownload of all gems on the gemfile, assigning them to the new bundler

Answer 4

A problem I had on my Mac using rbenv was that when I first set it up, it loaded a bunch of ruby executables in /usr/local/bin - these executables loaded the system ruby, rather than the current version.

If you run

which bundle

And it shows /usr/local/bin/bundle you may have this issue.

Search through /usr/local/bin and delete any files that start with #!/user/bin ruby

Then run

rbenv rehash

Answer 5

If you are using rbenv then make sure that you run the "rbenv rehash" command after you set local or global ruby version. It solved the issue for me.

rbenv rehash