pipenv-lock-yaml.txt

$ pipenv lock --verbose
Locking [dev-packages] dependencies...
Locking [packages] dependencies...
using sources: [{'url': 'https://pypi.org/simple', 'verify_ssl': True, 'name': 'pypi'}]
Using pip: -i https://pypi.org/simple

                          ROUND 1                           
Current constraints:
  ruamel.yaml==0.10.11 (from -r /var/folders/vm/nd6nhd948xj4ds001s76srj80000gn/T/pipenv-quepzcpu-requirements/pipenv-btnrwlic-constraints.txt (line 2))

Finding the best candidates:
  found candidate ruamel.yaml==0.10.11 (constraint was ==0.10.11)

Finding secondary dependencies:
  ruamel.yaml==0.10.11      requires ruamel.base>=1.0.0, ruamel.ordereddict, ruamel.yaml==0.10.11

New dependencies found in this round:
  adding ['ruamel.base', '>=1.0.0', '[]']
  adding ['ruamel.ordereddict', '', '[]']
  adding ['ruamel.yaml', '==0.10.11', '[]']
Removed dependencies in this round:
Unsafe dependencies in this round:
------------------------------------------------------------
Result of round 1: not stable

                          ROUND 2                           
Current constraints:
  ruamel.base>=1.0.0
  ruamel.ordereddict
  ruamel.yaml==0.10.11 (from -r /var/folders/vm/nd6nhd948xj4ds001s76srj80000gn/T/pipenv-quepzcpu-requirements/pipenv-btnrwlic-constraints.txt (line 2))

Finding the best candidates:
  found candidate ruamel.base==1.0.0 (constraint was >=1.0.0)
  found candidate ruamel.ordereddict==0.4.13 (constraint was <any>)
  found candidate ruamel.yaml==0.10.11 (constraint was ==0.10.11)

Finding secondary dependencies:
  ruamel.base==1.0.0        requires ruamel.base==1.0.0
  ruamel.ordereddict==0.4.13 requires ruamel.ordereddict==0.4.13
  ruamel.yaml==0.10.11      requires ruamel.base>=1.0.0, ruamel.ordereddict, ruamel.yaml==0.10.11

New dependencies found in this round:
  adding ['ruamel.base', '==1.0.0,>=1.0.0', '[]']
  adding ['ruamel.ordereddict', '==0.4.13', '[]']
Removed dependencies in this round:
  removing ['ruamel.base', '>=1.0.0', '[]']
  removing ['ruamel.ordereddict', '', '[]']
Unsafe dependencies in this round:
------------------------------------------------------------
Result of round 2: not stable

                          ROUND 3                           
Current constraints:
  ruamel.base==1.0.0,>=1.0.0
  ruamel.ordereddict==0.4.13
  ruamel.yaml==0.10.11 (from -r /var/folders/vm/nd6nhd948xj4ds001s76srj80000gn/T/pipenv-quepzcpu-requirements/pipenv-btnrwlic-constraints.txt (line 2))

Finding the best candidates:
  found candidate ruamel.base==1.0.0 (constraint was ==1.0.0,>=1.0.0)
  found candidate ruamel.ordereddict==0.4.13 (constraint was ==0.4.13)
  found candidate ruamel.yaml==0.10.11 (constraint was ==0.10.11)

Finding secondary dependencies:
  ruamel.ordereddict==0.4.13 requires ruamel.ordereddict==0.4.13
  ruamel.yaml==0.10.11      requires ruamel.base>=1.0.0, ruamel.ordereddict, ruamel.yaml==0.10.11
  ruamel.base==1.0.0        requires ruamel.base==1.0.0
------------------------------------------------------------
Result of round 3: stable, done

Updated Pipfile.lock (78f8b5)!