diff --git a/Makefile b/Makefile
index 32a2515..ab1ed06 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,4 @@
 symlinks = \
-	asdfrc \
 	atom \
 	bundle \
 	config \
@@ -8,9 +7,9 @@ symlinks = \
 	gitconfig \
 	gitignore \
 	pryrc \
-	ruby-version \
 	tmux \
 	tmux.conf \
+	tool-versions \
 	vimrc \
 
 default: | update clean
diff --git a/asdfrc b/asdfrc
deleted file mode 100644
index e600bd0..0000000
--- a/asdfrc
+++ /dev/null
@@ -1 +0,0 @@
-legacy_version_file = yes
diff --git a/tool-versions b/tool-versions
new file mode 100644
index 0000000..a7e49f2
--- /dev/null
+++ b/tool-versions
@@ -0,0 +1 @@
+ruby 3.0.1