diff --git a/.ruby-version b/.ruby-version
index aedc15b..57cf282 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.5.3
+2.6.5
diff --git a/.travis.yml b/.travis.yml
index bbcf44e..f32fcbc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,8 @@ rvm:
   - 2.3
   - 2.4
   - 2.5
+  - 2.6
+  - 2.7
   - ruby-head
 matrix:
   allow_failures:
diff --git a/Gemfile.lock b/Gemfile.lock
index db082ed..7f65e76 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,20 +2,20 @@ GEM
   remote: https://rubygems.org/
   specs:
     diff-lcs (1.3)
-    pg_query (1.1.0)
-    rspec (3.8.0)
-      rspec-core (~> 3.8.0)
-      rspec-expectations (~> 3.8.0)
-      rspec-mocks (~> 3.8.0)
-    rspec-core (3.8.0)
-      rspec-support (~> 3.8.0)
-    rspec-expectations (3.8.2)
+    pg_query (1.2.0)
+    rspec (3.9.0)
+      rspec-core (~> 3.9.0)
+      rspec-expectations (~> 3.9.0)
+      rspec-mocks (~> 3.9.0)
+    rspec-core (3.9.1)
+      rspec-support (~> 3.9.1)
+    rspec-expectations (3.9.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
-    rspec-mocks (3.8.0)
+      rspec-support (~> 3.9.0)
+    rspec-mocks (3.9.1)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.8.0)
-    rspec-support (3.8.0)
+      rspec-support (~> 3.9.0)
+    rspec-support (3.9.2)
 
 PLATFORMS
   ruby
@@ -25,4 +25,4 @@ DEPENDENCIES
   rspec
 
 BUNDLED WITH
-   1.17.1
+   1.17.2