diff --git a/.travis.yml b/.travis.yml
index 0d9c7495..1f8285d4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,6 @@
+sudo: required
+cache: bundler
+dist: trusty
 language: ruby
 rvm:
   - 2.3
@@ -10,6 +13,7 @@ rvm:
 gemfile:
   - gemfiles/standalone.gemfile
   - gemfiles/openssl_2.1.gemfile
+  - gemfiles/rbnacl.gemfile
 script: 
   - bundle exec rspec 
   - bundle exec codeclimate-test-reporter
diff --git a/Appraisals b/Appraisals
new file mode 100644
index 00000000..f818a160
--- /dev/null
+++ b/Appraisals
@@ -0,0 +1,10 @@
+appraise 'standalone' do
+end
+
+appraise 'openssl' do
+  gem 'openssl', '~> 2.1'
+end
+
+appraise 'rbnacl' do
+  gem 'rbnacl'
+end
\ No newline at end of file
diff --git a/gemfiles/openssl.gemfile b/gemfiles/openssl.gemfile
new file mode 100644
index 00000000..94ce8660
--- /dev/null
+++ b/gemfiles/openssl.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "openssl", "~> 2.1"
+
+gemspec path: "../"
diff --git a/gemfiles/openssl_2.1.gemfile b/gemfiles/openssl_2.1.gemfile
deleted file mode 100644
index e69de29b..00000000
diff --git a/gemfiles/rbnacl.gemfile b/gemfiles/rbnacl.gemfile
new file mode 100644
index 00000000..ad523a89
--- /dev/null
+++ b/gemfiles/rbnacl.gemfile
@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rbnacl"
+
+gemspec path: "../"
diff --git a/ruby-jwt.gemspec b/ruby-jwt.gemspec
index ac41e2ae..a0415b7d 100644
--- a/ruby-jwt.gemspec
+++ b/ruby-jwt.gemspec
@@ -20,6 +20,7 @@ Gem::Specification.new do |spec|
   spec.test_files = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = %w[lib]
 
+  spec.add_development_dependency 'appraisal'
   spec.add_development_dependency 'bundler'
   spec.add_development_dependency 'rake'
   spec.add_development_dependency 'rspec'
diff --git a/spec/jwt_spec.rb b/spec/jwt_spec.rb
index e49f8dee..440d4823 100644
--- a/spec/jwt_spec.rb
+++ b/spec/jwt_spec.rb
@@ -7,7 +7,7 @@
   let(:payload) { { 'user_id' => 'some@user.tld' } }
 
   let :data do
-    {
+   data = {
       :secret => 'My$ecretK3y',
       :rsa_private => OpenSSL::PKey.read(File.read(File.join(CERT_PATH, 'rsa-2048-private.pem'))),
       :rsa_public => OpenSSL::PKey.read(File.read(File.join(CERT_PATH, 'rsa-2048-public.pem'))),
@@ -19,8 +19,6 @@
       'ES384_public' => OpenSSL::PKey.read(File.read(File.join(CERT_PATH, 'ec384-public.pem'))),
       'ES512_private' => OpenSSL::PKey.read(File.read(File.join(CERT_PATH, 'ec512-private.pem'))),
       'ES512_public' => OpenSSL::PKey.read(File.read(File.join(CERT_PATH, 'ec512-public.pem'))),
-      'ED25519_private' =>  RbNaCl::Signatures::Ed25519::SigningKey.new('abcdefghijklmnopqrstuvwxyzABCDEF'),
-      'ED25519_public' => RbNaCl::Signatures::Ed25519::SigningKey.new('abcdefghijklmnopqrstuvwxyzABCDEF').verify_key,
       'NONE' => 'eyJhbGciOiJub25lIn0.eyJ1c2VyX2lkIjoic29tZUB1c2VyLnRsZCJ9.',
       'HS256' => 'eyJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoic29tZUB1c2VyLnRsZCJ9.kWOVtIOpWcG7JnyJG0qOkTDbOy636XrrQhMm_8JrRQ8',
       'HS512256' => 'eyJhbGciOiJIUzUxMjI1NiJ9.eyJ1c2VyX2lkIjoic29tZUB1c2VyLnRsZCJ9.Ds_4ibvf7z4QOBoKntEjDfthy3WJ-3rKMspTEcHE2bA',
@@ -36,6 +34,14 @@
       'PS384' => '',
       'PS512' => ''
     }
+
+    if defined?(RbNaCl)
+      data.merge!(
+        'ED25519_private' =>  RbNaCl::Signatures::Ed25519::SigningKey.new('abcdefghijklmnopqrstuvwxyzABCDEF'),
+        'ED25519_public' => RbNaCl::Signatures::Ed25519::SigningKey.new('abcdefghijklmnopqrstuvwxyzABCDEF').verify_key,
+      )
+    end
+    data
   end
 
   after(:each) do
@@ -99,7 +105,7 @@
       expect(validator).to receive(:validate!) { true }
 
       payload = {}
-      JWT.encode payload, "secret", JWT::Algos::Hmac::SUPPORTED.sample
+      JWT.encode payload, "secret", 'HS256'
     end
 
     it 'does not validate the payload if it is not present' do
@@ -107,11 +113,14 @@
       expect(JWT::ClaimsValidator).not_to receive(:new) { validator }
 
       payload = nil
-      JWT.encode payload, "secret", JWT::Algos::Hmac::SUPPORTED.sample
+      JWT.encode payload, "secret", 'HS256'
     end
   end
 
-  %w[HS256 HS512256 HS384 HS512].each do |alg|
+  algorithms = %w[HS256 HS384 HS512]
+  algorithms << 'HS512256' if defined?(RbNaCl)
+
+  algorithms.each do |alg|
     context "alg: #{alg}" do
       it 'should generate a valid token' do
         token = JWT.encode payload, data[:secret], alg
@@ -180,38 +189,40 @@
     end
   end
 
-  %w[ED25519].each do |alg|
-    context "alg: #{alg}" do
-      before(:each) do
-        data[alg] = JWT.encode payload, data["#{alg}_private"], alg
-      end
+  if defined?(RbNaCl)
+    %w[ED25519].each do |alg|
+      context "alg: #{alg}" do
+        before(:each) do
+          data[alg] = JWT.encode payload, data["#{alg}_private"], alg
+        end
 
-      let(:wrong_key) { OpenSSL::PKey.read(File.read(File.join(CERT_PATH, 'ec256-wrong-public.pem'))) }
+        let(:wrong_key) { OpenSSL::PKey.read(File.read(File.join(CERT_PATH, 'ec256-wrong-public.pem'))) }
 
-      it 'should generate a valid token' do
-        jwt_payload, header = JWT.decode data[alg], data["#{alg}_public"], true, algorithm: alg
+        it 'should generate a valid token' do
+          jwt_payload, header = JWT.decode data[alg], data["#{alg}_public"], true, algorithm: alg
 
-        expect(header['alg']).to eq alg
-        expect(jwt_payload).to eq payload
-      end
+          expect(header['alg']).to eq alg
+          expect(jwt_payload).to eq payload
+        end
 
-      it 'should decode a valid token' do
-        jwt_payload, header = JWT.decode data[alg], data["#{alg}_public"], true, algorithm: alg
+        it 'should decode a valid token' do
+          jwt_payload, header = JWT.decode data[alg], data["#{alg}_public"], true, algorithm: alg
 
-        expect(header['alg']).to eq alg
-        expect(jwt_payload).to eq payload
-      end
+          expect(header['alg']).to eq alg
+          expect(jwt_payload).to eq payload
+        end
 
-      it 'wrong key should raise JWT::DecodeError' do
-        expect do
-          JWT.decode data[alg], wrong_key
-        end.to raise_error JWT::DecodeError
-      end
+        it 'wrong key should raise JWT::DecodeError' do
+          expect do
+            JWT.decode data[alg], wrong_key
+          end.to raise_error JWT::DecodeError
+        end
 
-      it 'wrong key and verify = false should not raise JWT::DecodeError' do
-        expect do
-          JWT.decode data[alg], wrong_key, false
-        end.not_to raise_error
+        it 'wrong key and verify = false should not raise JWT::DecodeError' do
+          expect do
+            JWT.decode data[alg], wrong_key, false
+          end.not_to raise_error
+        end
       end
     end
   end