diff --git a/.ruby-version b/.ruby-version
index 276cbf9e2..aedc15bb0 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.3.0
+2.5.3
diff --git a/Gemfile.lock b/Gemfile.lock
index 8dcf90423..974f4e659 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -450,7 +450,7 @@ DEPENDENCIES
   whenever
 
 RUBY VERSION
-   ruby 2.3.0p0
+   ruby 2.5.3p105
 
 BUNDLED WITH
    1.16.2