diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..57cf282
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+2.6.5
diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..7811505
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1 @@
+ruby 2.6.5