diff --git a/flake.lock b/flake.lock
index b69d322..af7e7bf 100644
--- a/flake.lock
+++ b/flake.lock
@@ -28,15 +28,16 @@
         ]
       },
       "locked": {
-        "lastModified": 1690231039,
-        "narHash": "sha256-O5mIDXhe4FAEdRpoVxVtg003/UUNweUTu14cdNT8SLE=",
+        "lastModified": 1688933605,
+        "narHash": "sha256-eux5CjKmO+6GFoovtckoVo0es1FZ2mzupehDyHuCaCk=",
         "owner": "astro",
         "repo": "microvm.nix",
-        "rev": "062fd71f2a8f25c5d80864eb99bdff98e1684efb",
+        "rev": "018691bf86a70b7e5d24eb37d6aad05ce1c1b12e",
         "type": "github"
       },
       "original": {
         "owner": "astro",
+        "ref": "v0.4.0",
         "repo": "microvm.nix",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index cee5bbe..0111324 100644
--- a/flake.nix
+++ b/flake.nix
@@ -10,7 +10,7 @@
     };
 
     microvm = {
-      url = "github:astro/microvm.nix";
+      url = "github:astro/microvm.nix/v0.4.0";
       inputs = {
         nixpkgs.follows = "nixpkgs";
         flake-utils.follows = "flake-utils";