diff --git a/.envrc b/.envrc
index af3b9a0..30fdeac 100644
--- a/.envrc
+++ b/.envrc
@@ -1,3 +1,7 @@
+if ! has nix_direnv_version || ! nix_direnv_version 3.0.5; then
+    source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/3.0.5/direnvrc" "sha256-RuwIS+QKFj/T9M2TFXScjBsLR6V3A17YVoEW/Q6AZ1w="
+fi
+
 use flake
 
 source_env_if_exists .envrc.local