diff --git a/.ruby-version b/.ruby-version
index 35cee72..437459c 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.4.3
+2.5.0
diff --git a/.tool-versions b/.tool-versions
index 5cfccd9..0531904 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-ruby 2.4.3
+ruby 2.5.0