diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8eb14798..543b45b3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+### Unreleased
+* Feature: [#214](https://github.com/savonrb/httpi/pull/214) Add SSL ciphers configuration
+
 ### 2.4.5
 
 * Improvement: [#209](https://github.com/savonrb/httpi/pull/209) Drop Travis CI support for Ruby < 2.3.0 and jruby.
diff --git a/httpi.gemspec b/httpi.gemspec
index d3745584..8136cf35 100644
--- a/httpi.gemspec
+++ b/httpi.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'rubyntlm', '~> 0.3.2'
   s.add_development_dependency 'rake',     '~> 10.0'
-  s.add_development_dependency 'rspec',    '~> 2.14'
+  s.add_development_dependency 'rspec',    '~> 3.5'
   s.add_development_dependency 'mocha',    '~> 0.13'
   s.add_development_dependency 'puma',     '~> 2.3.2'
   s.add_development_dependency 'webmock'
diff --git a/lib/httpi/adapter/curb.rb b/lib/httpi/adapter/curb.rb
index a79fd81c..960aa231 100644
--- a/lib/httpi/adapter/curb.rb
+++ b/lib/httpi/adapter/curb.rb
@@ -116,6 +116,7 @@ def setup_ssl_auth
           @client.cert_key = ssl.cert_key_file
           @client.cert = ssl.cert_file
           @client.certpassword = ssl.cert_key_password
+          @client.set(:ssl_cipher_list, ssl.ciphers.join(':')) if ssl.ciphers
 
           @client.ssl_verify_peer = ssl.verify_mode == :peer
         end
diff --git a/lib/httpi/adapter/excon.rb b/lib/httpi/adapter/excon.rb
index 4821696b..23207430 100644
--- a/lib/httpi/adapter/excon.rb
+++ b/lib/httpi/adapter/excon.rb
@@ -73,6 +73,7 @@ def client_opts
           opts[:ssl_verify_peer] = false
         end
 
+        opts[:ciphers] = ssl.ciphers if ssl.ciphers
         opts[:ssl_version] = ssl.ssl_version if ssl.ssl_version
         opts[:ssl_min_version] = ssl.min_version if ssl.min_version
         opts[:ssl_max_version] = ssl.max_version if ssl.max_version
diff --git a/lib/httpi/adapter/http.rb b/lib/httpi/adapter/http.rb
index 61389c30..6d387484 100644
--- a/lib/httpi/adapter/http.rb
+++ b/lib/httpi/adapter/http.rb
@@ -61,6 +61,7 @@ def create_client
           context.min_version = @request.auth.ssl.min_version if @request.auth.ssl.min_version != nil
           context.max_version = @request.auth.ssl.max_version if @request.auth.ssl.max_version != nil
           context.verify_mode = @request.auth.ssl.openssl_verify_mode
+          context.ciphers     = @request.auth.ssl.ciphers if @request.auth.ssl.ciphers
 
           client = ::HTTP::Client.new(:ssl_context => context)
         else
diff --git a/lib/httpi/adapter/httpclient.rb b/lib/httpi/adapter/httpclient.rb
index 6b920e9c..b4ae3623 100644
--- a/lib/httpi/adapter/httpclient.rb
+++ b/lib/httpi/adapter/httpclient.rb
@@ -73,6 +73,7 @@ def setup_ssl_auth
           # Send client-side certificate regardless of state of SSL verify mode
           @client.ssl_config.client_cert = ssl.cert
           @client.ssl_config.client_key = ssl.cert_key
+          @client.ssl_config.ciphers = ssl.ciphers if ssl.ciphers
 
           @client.ssl_config.verify_mode = ssl.openssl_verify_mode
         end
diff --git a/lib/httpi/adapter/net_http.rb b/lib/httpi/adapter/net_http.rb
index 9972d0c7..bf1fc9eb 100644
--- a/lib/httpi/adapter/net_http.rb
+++ b/lib/httpi/adapter/net_http.rb
@@ -177,6 +177,7 @@ def setup_ssl_auth
           # Send client-side certificate regardless of state of SSL verify mode
           @client.key = ssl.cert_key
           @client.cert = ssl.cert
+          @client.ciphers = ssl.ciphers if ssl.ciphers
 
           @client.verify_mode = ssl.openssl_verify_mode
         end
diff --git a/lib/httpi/auth/ssl.rb b/lib/httpi/auth/ssl.rb
index d0882e5c..ab800286 100644
--- a/lib/httpi/auth/ssl.rb
+++ b/lib/httpi/auth/ssl.rb
@@ -25,7 +25,7 @@ class SSL
 
       # Returns whether SSL configuration is present.
       def present?
-        (verify_mode == :none) || (cert && cert_key) || ca_cert_file
+        (verify_mode == :none) || (cert && cert_key) || ca_cert_file || ciphers
       rescue TypeError, Errno::ENOENT
         false
       end
@@ -48,6 +48,24 @@ def present?
       # Certificate store holds trusted CA certificates used to verify peer certificates.
       attr_accessor :cert_store
 
+      # Accessor for the SSL ciphers list.
+      attr_reader :ciphers
+
+      # Sets the available symmetric algorithms for encryption and decryption.
+      # @see OpenSSL::SSL::SSLContext#ciphers
+      # @example
+      #   ssl.ciphers = "cipher1:cipher2:..."
+      #   ssl.ciphers = [name, ...]
+      #   ssl.ciphers = [[name, version, bits, alg_bits], ...]
+      def ciphers=(ciphers)
+        @ciphers =
+          if ciphers
+            context = OpenSSL::SSL::SSLContext.new
+            context.ciphers = ciphers
+            context.ciphers.map(&:first)
+          end
+      end
+
       # Returns the cert type to validate SSL certificates PEM|DER.
       def cert_type
         @cert_type ||= :pem
diff --git a/spec/httpi/adapter/curb_spec.rb b/spec/httpi/adapter/curb_spec.rb
index 8ee835ed..c120e651 100644
--- a/spec/httpi/adapter/curb_spec.rb
+++ b/spec/httpi/adapter/curb_spec.rb
@@ -250,6 +250,13 @@
           request
         end
 
+        it 'sets ssl_cipher_list' do
+          request.auth.ssl.ciphers = ["AES128"]
+          curb.expects(:set).with(any_parameters).at_least(1)
+          curb.expects(:set).with(:ssl_cipher_list, anything)
+          adapter.request(:get)
+        end
+
         context 'sets ssl_version' do
           it 'defaults to nil when no ssl_version is specified' do
             curb.expects(:ssl_version=).with(nil)
diff --git a/spec/httpi/adapter/em_http_spec.rb b/spec/httpi/adapter/em_http_spec.rb
index e0a6eda6..27561b53 100644
--- a/spec/httpi/adapter/em_http_spec.rb
+++ b/spec/httpi/adapter/em_http_spec.rb
@@ -150,7 +150,7 @@
 
         it "raises an error for HTTP digest auth" do
           request.auth.digest "username", "password"
-          expect { adapter.request(:get) }.to raise_error
+          expect { adapter.request(:get) }.to raise_error HTTPI::NotSupportedError
         end
       end
 
diff --git a/spec/httpi/adapter/httpclient_spec.rb b/spec/httpi/adapter/httpclient_spec.rb
index 31562377..6ed1a2be 100644
--- a/spec/httpi/adapter/httpclient_spec.rb
+++ b/spec/httpi/adapter/httpclient_spec.rb
@@ -141,6 +141,13 @@
 
         adapter.request(:get)
       end
+
+      it 'should set the ciphers if specified' do
+        request.auth.ssl.ciphers = OpenSSL::Cipher.ciphers
+        ssl_config.expects(:ciphers=).with(request.auth.ssl.ciphers)
+
+        adapter.request(:get)
+      end
     end
 
     context "(for SSL client auth)" do
diff --git a/spec/httpi/auth/ssl_spec.rb b/spec/httpi/auth/ssl_spec.rb
index 10618241..e44b3d45 100644
--- a/spec/httpi/auth/ssl_spec.rb
+++ b/spec/httpi/auth/ssl_spec.rb
@@ -189,6 +189,23 @@
     end
   end
 
+  describe '#ciphers' do
+    subject { ssl.ciphers }
+    let(:ssl) { HTTPI::Auth::SSL.new }
+
+    context 'without ciphers' do
+      before { ssl.ciphers = nil }
+
+      it { is_expected.to eq(nil) }
+    end
+
+    context 'with ciphers' do
+      before { ssl.ciphers = OpenSSL::Cipher.ciphers }
+
+      it { is_expected.to be_any.and(all(be_an_instance_of(String))) }
+    end
+  end
+
   def ssl
     ssl = HTTPI::Auth::SSL.new
     ssl.cert_key_file = "spec/fixtures/client_key.pem"
diff --git a/spec/integration/curb_spec.rb b/spec/integration/curb_spec.rb
index 598a82aa..28d9fe7f 100644
--- a/spec/integration/curb_spec.rb
+++ b/spec/integration/curb_spec.rb
@@ -123,6 +123,15 @@
         response = HTTPI.get(request, adapter)
         expect(response.body).to eq("get")
       end
+
+      it "works with ciphers" do
+        request = HTTPI::Request.new(@server.url)
+        request.auth.ssl.ca_cert_file = IntegrationServer.ssl_ca_file
+        request.auth.ssl.ciphers = OpenSSL::Cipher.ciphers
+
+        response = HTTPI.get(request, adapter)
+        expect(response.body).to eq("get")
+      end
     end
 
   end
diff --git a/spec/integration/excon_spec.rb b/spec/integration/excon_spec.rb
index 81723eee..cab31f92 100644
--- a/spec/integration/excon_spec.rb
+++ b/spec/integration/excon_spec.rb
@@ -1,7 +1,7 @@
 require "spec_helper"
 require "integration/support/server"
 
-describe HTTPI::Adapter::HTTPClient do
+describe HTTPI::Adapter::Excon do
 
   subject(:adapter) { :excon }
 
@@ -159,6 +159,15 @@
         response = HTTPI.get(request, adapter)
         expect(response.body).to eq("get")
       end
+
+      it "works with ciphers" do
+        request = HTTPI::Request.new(@server.url)
+        request.auth.ssl.ca_cert_file = IntegrationServer.ssl_ca_file
+        request.auth.ssl.ciphers = OpenSSL::Cipher.ciphers
+
+        response = HTTPI.get(request, adapter)
+        expect(response.body).to eq("get")
+      end
     end
   end
 
diff --git a/spec/integration/fixtures/ca_all.pem b/spec/integration/fixtures/ca_all.pem
index c642a417..a69ea6fb 100644
--- a/spec/integration/fixtures/ca_all.pem
+++ b/spec/integration/fixtures/ca_all.pem
@@ -1,44 +1,19 @@
 -----BEGIN CERTIFICATE-----
-MIID0DCCArigAwIBAgIBADANBgkqhkiG9w0BAQUFADA8MQswCQYDVQQGDAJKUDES
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------END CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/spec/integration/fixtures/server.cert b/spec/integration/fixtures/server.cert
index 998ccc58..5c3c334e 100644
--- a/spec/integration/fixtures/server.cert
+++ b/spec/integration/fixtures/server.cert
@@ -1,19 +1,19 @@
 -----BEGIN CERTIFICATE-----
-MIIC/zCCAeegAwIBAgIBATANBgkqhkiG9w0BAQUFADA/MQswCQYDVQQGDAJKUDES
-MBAGA1UECgwJSklOLkdSLkpQMQwwCgYDVQQLDANSUlIxDjAMBgNVBAMMBVN1YkNB
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 -----END CERTIFICATE-----
diff --git a/spec/integration/fixtures/server.key b/spec/integration/fixtures/server.key
index 9ba2218a..75a358ff 100644
--- a/spec/integration/fixtures/server.key
+++ b/spec/integration/fixtures/server.key
@@ -1,15 +1,27 @@
 -----BEGIN RSA PRIVATE KEY-----
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 -----END RSA PRIVATE KEY-----
diff --git a/spec/integration/http_spec.rb b/spec/integration/http_spec.rb
index 3593b260..655a51ca 100644
--- a/spec/integration/http_spec.rb
+++ b/spec/integration/http_spec.rb
@@ -141,6 +141,15 @@
         response = HTTPI.get(request, adapter)
         expect(response.body).to eq("get")
       end
+
+      it "works with ciphers" do
+        request = HTTPI::Request.new(@server.url)
+        request.auth.ssl.ca_cert_file = IntegrationServer.ssl_ca_file
+        request.auth.ssl.ciphers = OpenSSL::Cipher.ciphers
+
+        response = HTTPI.get(request, adapter)
+        expect(response.body).to eq("get")
+      end
     end
   end
 
diff --git a/spec/integration/httpclient_spec.rb b/spec/integration/httpclient_spec.rb
index be52cb88..36fd0c7e 100644
--- a/spec/integration/httpclient_spec.rb
+++ b/spec/integration/httpclient_spec.rb
@@ -121,6 +121,15 @@
         response = HTTPI.get(request, adapter)
         expect(response.body).to eq("get")
       end
+
+      it "works with ciphers" do
+        request = HTTPI::Request.new(@server.url)
+        request.auth.ssl.ca_cert_file = IntegrationServer.ssl_ca_file
+        request.auth.ssl.ciphers = OpenSSL::Cipher.ciphers
+
+        response = HTTPI.get(request, adapter)
+        expect(response.body).to eq("get")
+      end
     end
   end
 
diff --git a/spec/integration/net_http_persistent_spec.rb b/spec/integration/net_http_persistent_spec.rb
index c64b0942..9709e02c 100644
--- a/spec/integration/net_http_persistent_spec.rb
+++ b/spec/integration/net_http_persistent_spec.rb
@@ -1,7 +1,8 @@
 require "spec_helper"
 require "integration/support/server"
+require "net/http/persistent"
 
-describe HTTPI::Adapter::NetHTTP do
+describe HTTPI::Adapter::NetHTTPPersistent do
 
   subject(:adapter) { :net_http_persistent }
 
@@ -122,6 +123,17 @@
         response = HTTPI.get(request, adapter)
         expect(response.body).to eq("get")
       end
+
+      it "works with ciphers" do
+        skip("Requires net-http-persistent 3.x") unless Net::HTTP::Persistent::VERSION.start_with? "3."
+
+        request = HTTPI::Request.new(@server.url)
+        request.auth.ssl.ca_cert_file = IntegrationServer.ssl_ca_file
+        request.auth.ssl.ciphers = OpenSSL::Cipher.ciphers
+
+        response = HTTPI.get(request, adapter)
+        expect(response.body).to eq("get")
+      end
     end
   end
 
diff --git a/spec/integration/net_http_spec.rb b/spec/integration/net_http_spec.rb
index 34d60db4..ec2dc43d 100644
--- a/spec/integration/net_http_spec.rb
+++ b/spec/integration/net_http_spec.rb
@@ -227,6 +227,15 @@
         response = HTTPI.get(request, adapter)
         expect(response.body).to eq("get")
       end
+
+      it "works with ciphers" do
+        request = HTTPI::Request.new(@server.url)
+        request.auth.ssl.ca_cert_file = IntegrationServer.ssl_ca_file
+        request.auth.ssl.ciphers = OpenSSL::Cipher.ciphers
+
+        response = HTTPI.get(request, adapter)
+        expect(response.body).to eq("get")
+      end
     end
   end