diff --git a/pkgs/by-name/he/heisenbridge/package.nix b/pkgs/by-name/he/heisenbridge/package.nix
index 625ff384a2c5..e4193a0eaad1 100644
--- a/pkgs/by-name/he/heisenbridge/package.nix
+++ b/pkgs/by-name/he/heisenbridge/package.nix
@@ -27,6 +27,8 @@ python3.pkgs.buildPythonApplication (finalAttrs: {
 
   pythonRelaxDeps = [
     "irc"
+    "ruamel.yaml"
+    "mautrix"
   ];
 
   dependencies = with python3.pkgs; [