如果我检查我的 pipenv 版本，它总是显示 5.3.5，但我知道有更新的版本 11.0.2。如何使用 pip 更新它？
C:\hello_world>pip search pipenv
dh-pipenv (0.1.1) - Shim between dh-virtualenv and pipenv
pipenv-package-requirements (0.2) - Pipenv tools for requirements.txt
pipenv-tools (0.0.1) - The missing tools for pipenv.
tox-pipenv (1.3.0) - A pipenv plugin for tox
pipenv-to-requirements (0.3.1) - Generate requirements[-dev].txt from
Pipfile using pipenv
pipenv (11.0.2) - Python Development Workflow for Humans.
INSTALLED: 5.3.5
LATEST: 11.0.2
安装时，我得到的只是：
C:\hello_world>pip install pipenv
Requirement already satisfied: pipenv in c:\users\administrator\appdata\roaming\
python\python36\site-packages
Requirement already satisfied: virtualenv in c:\users\administrator\appdata\roam
ing\python\python36\site-packages (from pipenv)
Requirement already satisfied: semver in c:\users\administrator\appdata\roaming\
python\python36\site-packages (from pipenv)
Requirement already satisfied: pip in c:\python36\lib\site-packages (from pipenv
)
Requirement already satisfied: pip-tools>=1.9.0 in c:\users\administrator\appdat
a\roaming\python\python36\site-packages (from pipenv)
Requirement already satisfied: background in c:\users\administrator\appdata\roam
ing\python\python36\site-packages (from pipenv)
Requirement already satisfied: setuptools>=36.3.0 in c:\users\administrator\appd
ata\roaming\python\python36\site-packages (from pipenv)
Requirement already satisfied: pew>=0.1.26 in c:\users\administrator\appdata\roa
ming\python\python36\site-packages (from pipenv)
Requirement already satisfied: click>=6 in c:\users\administrator\appdata\roamin
g\python\python36\site-packages (from pip-tools>=1.9.0->pipenv)
Requirement already satisfied: six in c:\python36\lib\site-packages (from pip-to
ols>=1.9.0->pipenv)
Requirement already satisfied: first in c:\users\administrator\appdata\roaming\p
ython\python36\site-packages (from pip-tools>=1.9.0->pipenv)
Requirement already satisfied: futures in c:\users\administrator\appdata\roaming
\python\python36\site-packages (from background->pipenv)
Requirement already satisfied: virtualenv-clone>=0.2.5 in c:\users\administrator
\appdata\roaming\python\python36\site-packages (from pew>=0.1.26->pipenv)
Requirement already satisfied: pythonz-bd>=1.10.2 in c:\users\administrator\appd
ata\roaming\python\python36\site-packages (from pew>=0.1.26->pipenv)
Requirement already satisfied: resumable-urlretrieve; python_version == "3.6" in
c:\users\administrator\appdata\roaming\python\python36\site-packages (from pyth
onz-bd>=1.10.2->pew>=0.1.26->pipenv)
Requirement already satisfied: requests in c:\python36\lib\site-packages (from r
esumable-urlretrieve; python_version == "3.6"->pythonz-bd>=1.10.2->pew>=0.1.26->
pipenv)
这个问题很简单，但主要是向你们展示我所看到的代码。所以这基本上是填充文本，以便 StackOverflow 停止标记问题主要是代码。请帮忙。