diff --git a/.gitignore b/.gitignore
index c5b2d52..c3a41d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,6 @@
 .byebug_history
 .claude
 .env*
-.ruby-version
 .tool-versions
 .yarn-integrity
 .DS_Store
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..1454f6e
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+4.0.1