diff --git a/pkgs/servers/home-assistant/custom-components/sun2/package.nix b/pkgs/servers/home-assistant/custom-components/sun2/package.nix
index f5ed377c6951..a2c1ee9428ee 100644
--- a/pkgs/servers/home-assistant/custom-components/sun2/package.nix
+++ b/pkgs/servers/home-assistant/custom-components/sun2/package.nix
@@ -7,13 +7,13 @@
 buildHomeAssistantComponent rec {
   owner = "pnbruckner";
   domain = "sun2";
-  version = "3.4.1";
+  version = "3.4.2b0";
 
   src = fetchFromGitHub {
     inherit owner;
     repo = "ha-sun2";
     tag = version;
-    hash = "sha256-VzlwmAzebxykE9rIhAiAFkEOvbh2UkgNMGQaysDA9D4=";
+    hash = "sha256-M+ClqFOeZUw5Rk5vaNnyRBeXU+yTSYTk70TJqcqtehU=";
   };
 
   meta = rec {