Can't install Ruby 2.3.0 because of CURL

deployer@www:~$ rvm reinstall ruby-2.3.0
ruby-2.3.0 - #removing src/ruby-2.3.0..
ruby-2.3.0 - #removing rubies/ruby-2.3.0..
Searching for binary rubies, this might take some time.
Found remote file https://rubies.travis-ci.org/ubuntu/14.04/x86_64/ruby-2.3.0.tar.bz2
Checking requirements for ubuntu.
Requirements installation successful.
ruby-2.3.0 - #configure
ruby-2.3.0 - #download
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (60) SSL certificate problem: self signed certificate in certificate chain
More details here: http://curl.haxx.se/docs/sslcerts.html

curl performs SSL certificate verification by default, using a "bundle"
 of Certificate Authority (CA) public keys (CA certs). If the default
 bundle file isn't adequate, you can specify an alternate file
 using the --cacert option.
If this HTTPS server uses a certificate signed by a CA represented in
 the bundle, the certificate verification probably failed due to a
 problem with the certificate (it might be expired, or the name might
 not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
 the -k (or --insecure) option.
/home/deployer/.rvm/scripts/fetch: line 105: log: command not found
Checking fallback: ftp://rubies.travis-ci.org/ubuntu/14.04/x86_64/ruby-2.3.0.tar.bz2?rvm=1.26.11
Checking fallback: http://www.mirrorservice.org/sites/rubies.travis-ci.org/ubuntu/14.04/x86_64/ruby-2.3.0.tar.bz2?rvm=1.26.11
No fallback URL could be found, try increasing timeout with:

    echo "export rvm_max_time_flag=20" >> ~/.rvmrc

Downloading https://rubies.travis-ci.org/ubuntu/14.04/x86_64/ruby-2.3.0.tar.bz2 failed.
Mounting remote ruby failed with status 2, trying to compile.
Checking requirements for ubuntu.
Requirements installation successful.
Installing Ruby from source to: /home/deployer/.rvm/rubies/ruby-2.3.0, this may take a while depending on your cpu(s)...
ruby-2.3.0 - #downloading ruby-2.3.0, this may take a while depending on your connection...
ruby-2.3.0 - #extracting ruby-2.3.0 to /home/deployer/.rvm/src/ruby-2.3.0....
ruby-2.3.0 - #configuring..........................................................
ruby-2.3.0 - #post-configuration..
ruby-2.3.0 - #compiling.................................................................................
ruby-2.3.0 - #installing...........................
ruby-2.3.0 - #making binaries executable..
curl: (60) SSL certificate problem: unable to get local issuer certificate
More details here: http://curl.haxx.se/docs/sslcerts.html

curl performs SSL certificate verification by default, using a "bundle"
 of Certificate Authority (CA) public keys (CA certs). If the default
 bundle file isn't adequate, you can specify an alternate file
 using the --cacert option.
If this HTTPS server uses a certificate signed by a CA represented in
 the bundle, the certificate verification probably failed due to a
 problem with the certificate (it might be expired, or the name might
 not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
 the -k (or --insecure) option.
There was an error while trying to resolve rubygems version for 'latest'. 
Halting the installation.

I am pretty sure the last this happened I had to apt-get install ca-certificates.

Ah, just skipping secure check finally did it.

echo insecure >> ~/.curlrc