diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..94840b3
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+layout python3
diff --git a/.gitignore b/.gitignore
index 37e0a7f..6fa170c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -226,3 +226,4 @@ dmypy.json
 .pyre/
 
 # End of https://www.gitignore.io/api/osx,pycharm,python
+.direnv/
diff --git a/.python-version b/.python-version
deleted file mode 100644
index 0ac9d0a..0000000
--- a/.python-version
+++ /dev/null
@@ -1 +0,0 @@
-advent-of-code
diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..2ab8199
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1 @@
+python 3.11.2