diff --git a/nixos/linux.nix b/nixos/linux.nix
index c27f0fe..07144ab 100644
--- a/nixos/linux.nix
+++ b/nixos/linux.nix
@@ -385,7 +385,7 @@ in {
 
       "coldairnetworks" = {
         autoStart = true;
-        image = "quineglobal/coldairnetworks-com:latest";
+        image = "quineglobal/coldairnetworks-com@sha256:36f16006502171d82a107b1bd67517b9d602b54de31630a4861fba1e78250857";
         volumes = [];
         environment = {
 		POSTMARK_SERVER_TOKEN = "e718a146-c590-4550-a750-a3b925056e29";