Ruby Versions

How do I specify my app's Ruby version?
You have two options:
Write your Ruby version to a file called .ruby-version in the root of your git repo
echo "2.6.3 > .ruby-version"
git add .ruby-version
git commit -m "Set ruby version"
Or you can manage it in your Gemfile
ruby "2.6.3"
bundle
git add Gemfile Gemfile.lock
git commit -m "Set ruby version"
For legacy versions of Ruby, we only support the latest patch versions. 
Here's a list of supported Ruby versions that are currently supported:
0.3
0.2
0.1
0.0
7.5
7.4
7.3
7.2
7.1
7.0
6.9
6.8
6.7
6.6
6.5
6.4
6.3
6.2
6.1
6.0
5.9
5.8
5.7
5.6
5.5
5.4
5.3
5.1
5.0
4.10
4.9
4.8
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
2.10
2.9
2.8
2.7
2.6
0.0
9.3
8.7
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Last modified 11mo ago