diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index 468500a5d27e..3c5c6b8edb44 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -228,6 +228,8 @@ let
         };
       });
 
+      pydantic = super.pydantic_1;
+
       pydexcom = super.pydexcom.overridePythonAttrs (oldAttrs: rec {
         version = "0.2.3";
         src = fetchFromGitHub {