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Question Detail

I’ve install Python 3.4 and Python 3.6 on my local machine successfully, but am unable to install packages with pip3.

When I execute pip3 install <package>, I get the following SSL related error:

pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Collecting <package>
  Could not fetch URL https://pypi.python.org/simple/<package>/: There was a problem confirming the ssl certificate: Can't connect to HTTPS URL because the SSL module is not available. - skipping
  Could not find a version that satisfies the requirement <package> (from versions: )
No matching distribution found for <package>

How can I fix my Python3.x install so that I can install packages with pip install <package>?

Question Answer

Step by step guide to install Python 3.6 and pip3 in Ubuntu

  1. Install the necessary packages for Python and ssl: $ sudo apt-get install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev

  2. Download and unzip “Python-3.6.8.tar.xz” from https://www.python.org/ftp/python/ into your home directory.

  3. Open terminal in that directory and run: $ ./configure

  4. Build and install: $ make && sudo make install

  5. Install packages with: $ pip3 install package_name

Disclaimer: The above commands are not tested in Ubuntu 20.04 LTS.

If you are on Windows and use anaconda this worked for me:

I tried a lot of other solutions which did not work (Environment PATH Variable changes …)

The problem can be caused by DLLs in the Windows\System32 folder (e.g. libcrypto-1_1-x64.dll or libssl-1_1-x64.dll or others) placed there by other software.

The fix was installing openSSL from https://slproweb.com/products/Win32OpenSSL.html which replaces the dlls by more recent versions.

If you are on Red Hat/CentOS:

# To allow for building python ssl libs
yum install openssl-devel
# Download the source of *any* python version
cd /usr/src
wget https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tar.xz
tar xf Python-3.6.2.tar.xz 
cd Python-3.6.2

# Configure the build w/ your installed libraries

# Install into /usr/local/bin/python3.6, don't overwrite global python bin
make altinstall

I had a similar problem on OSX 10.11 due to installing memcached which installed python 3.7 on top of 3.6.

WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.

Spent hours on unlinking openssl, reinstalling, changing paths.. and nothing helped. Changing openssl version back from to older version did the trick:

brew switch openssl 1.0.2e

I did not see this suggestion anywhere in internet. Hope it serves someone.

In Ubuntu, this can help:

cd Python-3.6.2
./configure --with-ssl
sudo make install

Agree with the answer by mastaBlasta. Worked for me. I encountered the same problem as the topic description.

Environment: MacOS Sierra. And I use Homebrew.

My solution:

  1. Reinstall openssl by brew uninstall openssl; brew install openssl
  2. According to the hints given by Homebrew, do the following:

    echo 'export PATH="/usr/local/opt/openssl/bin:$PATH"' >> ~/.bash_profile
    export LDFLAGS="-L/usr/local/opt/openssl/lib"
    export CPPFLAGS="-I/usr/local/opt/openssl/include"

I had the same issue with python3.8.5 installation on Debian9. I have done a build, but when I have tried to download some modules, pip3.8 issued following error:

pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.

I have searched for the root of my problem and found out that there is a system dependent portion of the python build which is called by system independent one. In case of missing ssl you just needed to open python terminal and check whether is _ssl present:

>>> help('modules')
_sre                enum                pwd                 wave
_ssl                errno               py_compile          weakref
_stat               faulthandler        pyclbr              webbrowser

If not your system dependent ssl module part is missing. You can check it also by listing content of <python_installation_root>/lib/python3.8/lib-dynload:

>ls ./lib/python3.8/lib-dynload | grep ssl

The problem was caused as written by PengShaw by missing libssl-dev during the build. Therefore you have to follow the recommended python installation flow. First install prerequisites and then build and install the python. Installation without devel versions of libs resulted in my case in the missing system dependent part. In this case _ssl.

Note that the devel lib name differs for Debian and CentOS, therefore check whether the installation hints posted on net are suitable for your specific Linux system type:

For Debian:
sudo apt install -y libbz2-dev libffi-dev libssl-dev
./configure --enable-optimizations
make altinstall

For CentOS:
sudo yum -y install bzip2-devel libffi-devel openssl-devel
./configure --enable-optimizations
make altinstall

It is for sure a good idea to list configuration options prior the configuration and evtl. use some additional options:

./configure --help

Last but not least in case you use –prefix for a non-default installation location, remember to add your <python_installation_root>/lib to your LD_LIBRARY_PATH .

The problem probably caused by library missing.

Before you install python 3.6, make sure you install all the libraries required for python.

$ sudo apt-get install build-essential checkinstall 
$ sudo apt-get install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev

More information in How to Install Python 3.6.0 on Ubuntu & LinuxMint

If you are on Windows and use Anaconda you can try running “pip install …” command in Anaconda Prompt instead of cmd.exe, as user willliu1995 suggests here. This was the fastest solution for me, that does not require installation of additional components.

Downgrading openssl worked for me,

brew switch openssl 1.0.2s

If you are on OSX and have compiled python from source:

Install openssl using brew brew install openssl

Make sure to follow the instructions brew gives you about setting your CPPFLAGS and LDFLAGS. In my case I am using the [email protected] brew formula and I need these 3 settings for the python build process to correctly link to my SSL library:

export LDFLAGS="-L/usr/local/opt/[email protected]/lib"
export CPPFLAGS="-I/usr/local/opt/[email protected]/include"
export PKG_CONFIG_PATH="/usr/local/opt/[email protected]/lib/pkgconfig"

Assuming the library is installed at that location.

I encountered the same problem on windows 10. My very specific issue is due to my installation of Anaconda. I installed Anaconda and under the path Path/to/Anaconda3/, there comes the python.exe. Thus, I didn’t install python at all because Anaconda includes python. When using pip to install packages, I found the same error report, pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available..

The solution was the following:

1) you can download python again on the official website;

2) Navigate to the directory where "Python 3.7 (64-bit).lnk"is located

3) import ssl and exit()

4) type in cmd, "Python 3.7 (64-bit).lnk" -m pip install tensorflow for instance.

Here, you’re all set.

I tried A LOT of ways to solve this problem and none solved. I’m currently on Windows 10.

The only thing that worked was:

  • Uninstall Anaconda
  • Uninstall Python (i was using version 3.7.3)
  • Install Python again (remember to check the option to automatically add to PATH)

Then I’ve downloaded all the libs I needed using PIP… and worked!

Don’t know why, or if the problem was somehow related to Anaconda.

for osx brew users

my issue appeared related to my python installation and was quickly resolved by re-installing python3 and pip. i think it started misbehaving after an OS update but who knows (at this time I am on Mac OS 10.14.6)

brew reinstall python3 --force
# setup pip
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3 get-pip.py
# installa pkg successfully 
pip install pandas

You can do either of these two:

  1. While installing Anaconda, select the option to add Anaconda to the path.


  1. Find these (complete) paths from your installation folder of Anaconda and add them to the environment variable :








Add the above paths to the “Path” system variable and it should show the error no more 🙂

The ssl module is a TLS/SSL wrapper for accessing Operation Sytem (OS) socket (Lib/ssl.py). So when ssl module is not available, chances are that you either don’t have OS OpenSSL libraries installed, or those libraries were not found when you install Python. Let assume it is a later case (aka: you already have OpenSSL installed, but they are not correctly linked when installing Python).

I will also assume you are installing from source. If you are installing from binary (ie: Window .exe file), or package (Mac .dmg, or Ubuntu apt), there is not much you can do with the installing process.

During the step of configuring your python installation, you need to specify where the OS OpenSSL will be used for linking:

# python 3.8 beta
./configure --with-openssl="your_OpenSSL root"

So where will you find your installed OpenSSL directory?

# ubuntu 
locate ssl.h | grep '/openssl/ssl.h'


Your system may be different than mine, but as you see here I have many different installed openssl libraries. As the time of this writing, python 3.8 expects openssl 1.0.2 or 1.1:

Python requires an OpenSSL 1.0.2 or 1.1 compatible libssl with X509_VERIFY_PARAM_set1_host().

So you would need to verify which of those installed libraries that you can use for linking, for example

/usr/bin/openssl version

OpenSSL 1.0.2g  1 Mar 2016
./configure --with-openssl="/usr"
make && make install

You may need to try a few, or install a new, to find the library that would work for your Python and your OS.

I was having the same issue and was able to resolve with the following steps:

sudo yum install -y libffi-devel
sudo yum install openssl-devel
cd /usr/src
sudo wget https://www.python.org/ftp/python/3.7.1/Python-3.7.1.tar.xz
sudo tar xf Python-3.7.1.tar.xz
cd Python-3.7.1
sudo ./configure --enable-optimizations
# Install into /usr/local/bin/python3.7, don't overwrite global python bin
sudo make altinstall

depending on perms, you may not need sudo.

Collecting setuptools
Collecting pip
Installing collected packages: setuptools, pip
Successfully installed pip-10.0.1 setuptools-39.0.1

should now be able to run

python3.7 -V 


pip3.7 -V

When installing packages:

pip3.7 install pandas

or depending on perms, you can also add the –user flag like so:

pip3.7 install pandas --user

In my case with using Mac, I deleted
/Applications/Python 3.7.
because I already had Python3.7 by brew install python3 .

But it was a trigger of the message

pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.

What I did in my situation

  1. I downloaded macOS 64-bit installer again, and installed.
  2. Double click /Applications/Python3.6/Install Certificates.command and /Applications/Python3.6/Update Shell Profile.command.
  3. Reboot mac
  4. And I am not sure but possibly contributed to succeed is pip.conf. See pip install fails.

I finally solve this issue. These are the detail of my env:
Version of Python to install: 3.6.8
OS: Ubuntu 16.04.6 LTS
Root access: No

Some people suggest to install libssl-dev, but it did not work for me. I follow this link and I fixed it!
In short, I download, extract, build, and install OpenSSL (openssl-1.1.1b.tar.gz). Then, I modify .bashrc file follow this link.
Next, I download and extract Python-3.6.8.tgz. I edit Modules/Setup.dist to modify SSL path (lines around #211). I did ./configure --prefix=$HOME/opt/python-3.6.8, make and make install. Last, I modify my .bashrc. Notice that I do not include --enable-optimizations in ./configure.

I was able to fix this by updating the python version in this file.
pyenv: version `3.6.5′ is not installed (set by /Users/taruntarun/.python-version)
Though i had the latest version installed, my command was still using old version 3.6.5

Moving to version 3.7.3

If you are on OSX and in case the other solutions didn’t work for you (just like me).

You can try uninstalling python3 and upgrade pip3

brew uninstall --ignore-dependencies python3
pip3 install --upgrade pip   

This worked for me 😉

(NOT on Windows!)

This made me tear my hair out for a week, so I hope this will help someone

I tried everything short of re-installing Anaconda and/or Jupyter.


  • AWS Linux
  • Manually installed Anaconda 3-5.3.0
  • Python3 (3.7) was running inside anaconda (ie, ./anaconda3/bin/python)
  • there was also /usr/bin/python and /usr/bin/python3 (but these were not being used as most of the work was done in Jupyter’s terminal)


In Jupyter’s terminal:

cp /usr/lib64/libssl.so.10 ./anaconda3/lib/libssl.so.1.0.0

cp /usr/lib64/libcrypto.so.10 ./anaconda3/lib/libcrypto.so.1.0.0

What triggered this?

So, this was all working until I tried to do a conda install conda-forge

I’m not sure what happened, but conda must have updated openssl on the box (I’m guessing) so after this, everything broke.

Basically, unknown to me, conda had updated openssl, but somehow deleted the old libraries and replaced it with libssl.so.1.1 and libcrypto.so.1.1.

Python3, I guess, was compiled to look for libssl.so.1.0.0

In the end, the key to diagnosis was this:

python -c "import ssl; print (ssl.OPENSSL_VERSION)"

gave the clue library "libssl.so.1.0.0" not found

The huge assumption I made is that the yum version of ssl is the same as the conda version, so just renaming the shared object might work, and it did.

My other solution was to re-compile python, re-install anaconda, etc, but in the end I’m glad I didn’t need to.

Hope this helps you guys out.

In the case of using pyenv to manage python installations on Mac OS Catalina, I had to install openssl with brew first and then after that run pyenv install 3.7.8 which seemed to build the python installation using the openssl from homebrew (it even said as such in the installation output). Then pyenv global 3.7.8 and I was away.

On macos, configure python 3.8.1 with the command below will solve the problem, i think it would also work on Linux.

./configure --enable-optimizations --with-openssl=/usr/local/opt/[email protected]/

change the dir parameter based on your system.


This worked because i didnt have an existing openssl version installed.

pkg install openssl-tool

I’ve made some PATH changes to mimic part of the Anaconda Powershell Prompt $env:PATH


And It worked for me.

The python documentation is actually very clear, and following the instructions did the job whereas other answers I found here were not fixing this issue.

  1. first, install python 3.x.x from source using, for example with version 3.6.2 https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tar.xz

  2. make sure you have openssl installed by running brew install openssl

  3. unzip it and move to the python directory: tar xvzf Python-3.6.2.tar.xz && cd Python-3.6.2

  4. then if the python version is < 3.7, run

CPPFLAGS="-I$(brew --prefix openssl)/include" \
LDFLAGS="-L$(brew --prefix openssl)/lib" \
./configure --with-pydebug

5. finallly, run make -s -j2 (-s is the silent flag, -j2 tells your machine to use 2 jobs)

I had the same issue trying to install python3.7 on an ubuntu14.04 machine.
The issue was that I had some custom folders in my PKG_CONFIG_PATH and in my LD_LIBRARY_PATH, which prevented the python build process to find the system openssl libraries.

so try to clear them and see what happens:


Ok the latest answer to this, as of now don’t use Python 3.8, use only 3.7 or less , because of most of the libraries fail to install with the above error

I was having the same problem for the last two days and only have fixed it right now.

I had tried to use --trust-host option with the DigiCert_High_Assurance_EV_Root_CA.pem did not work, I couldn’t install the ssl module (It tells it cannot be installed for python versions greater than 2.6), setting the $PIP_CERT variable didn’t fix it either and I had libssl1.0.2 and libssl1.0.0 installed. Also worth mentioning I didn’t had a ~/.pip/pip.conf file, and creating it didn’t solve the bug either.

What finally solved it, was installing python3.6 with make again.
Download the Python-3.6.0.tgz from the website, run configure then make, make test and make install. Hope it works for you.

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