Wilco van Esch

Updating installed gems
ERROR: While executing gem ...
(Gem::RemoteFetcher::FetchError) SSL_connect returned=1
errno=0 state=SSLv3 read server certificate B: certificate
verify failed (https://api.rubygems.org/specs.4.8.gz)

Or:

ERROR: Could not find a valid gem 'activesupport' (>= 0),
here is why: Unable to download data from
https://rubygems.org/ - SSL_connect returned=1 errno=0
state=SSLv3 read server certificate B: certificate
verify failed (https://api.rubygems.org/specs.4.8.gz)

To fix this (in Windows):

1. Save the cacert.pem file to a folder, e.g. C:\Tools

2. Go into your System Environment Variables, and create a new environment variable:

   • Name: SSL_CERT_FILE
   • Value: C:\Tools\cacert.pem

3. Restart your terminal/console

If it still doesn't work, are you trying to access a Google API? In that case, use the cacerts.pem from the Google API Client library instead. Note it's called cacerts.pem, so you either save/rename it as cacert.pem or update SSL_CERT_FILE.

To fix this (in OS X):

See this StackOverflow answer.