diff --git a/machines/hiroshi/services/languagetool.nix b/machines/hiroshi/services/languagetool.nix
index a51598e..d5ec7d4 100644
--- a/machines/hiroshi/services/languagetool.nix
+++ b/machines/hiroshi/services/languagetool.nix
@@ -23,6 +23,9 @@ in
   # default log level is INFO, no easy way to reduce it.
   #systemd.services.languagetool.serviceConfig.StandardOutput = "null";
 
+  # It often runs out of java heap memory, no matter what settinsg are used.
+  systemd.services.languagetool.serviceConfig.Restart = "always";
+
   services.nginx.virtualHosts."languagetool.sbruder.de" = {
     enableACME = true;
     forceSSL = true;