diff --git a/.travis.yml b/.travis.yml
index 6ee988c..e5c3ceb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: ruby
 rvm:
-  - ruby-head
+  - 2.6
   - 2.5
   - 2.4
   - 2.3
diff --git a/Gemfile.lock b/Gemfile.lock
index acece46..f2bc301 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    echosign (1.5.0)
+    echosign (1.5.1)
       httparty (~> 0.16)
       json (~> 2)
       oauth2 (~> 1)
@@ -25,24 +25,28 @@ GEM
     docile (1.3.1)
     factory_girl (4.8.1)
       activesupport (>= 3.0.0)
-    faraday (0.12.2)
+    faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     hashdiff (0.3.7)
-    httparty (0.16.2)
+    httparty (0.16.3)
+      mime-types (~> 3.0)
       multi_xml (>= 0.5.2)
     i18n (1.1.0)
       concurrent-ruby (~> 1.0)
     jaro_winkler (1.5.1)
     json (2.1.0)
-    jwt (1.5.6)
+    jwt (2.1.0)
     method_source (0.8.2)
+    mime-types (3.2.2)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2018.0812)
     minitest (5.11.3)
     multi_json (1.13.1)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
-    oauth2 (1.4.0)
-      faraday (>= 0.8, < 0.13)
-      jwt (~> 1.0)
+    oauth2 (1.4.1)
+      faraday (>= 0.8, < 0.16.0)
+      jwt (>= 1.0, < 3.0)
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
diff --git a/lib/echosign/version.rb b/lib/echosign/version.rb
index fd09d04..66c606d 100644
--- a/lib/echosign/version.rb
+++ b/lib/echosign/version.rb
@@ -1,3 +1,3 @@
 module Echosign
-  VERSION = "1.5.0"
+  VERSION = "1.5.1"
 end