diff --git a/config/plugins/lsp/lsp.nix b/config/plugins/lsp/lsp.nix
index 6ca6a42..a713965 100644
--- a/config/plugins/lsp/lsp.nix
+++ b/config/plugins/lsp/lsp.nix
@@ -69,7 +69,7 @@ in
         puppet = {
           enable = true;
           package = puppet-editor-services;
-          cmd = "${puppet-editor-services}/bin/puppet-languageserver";
+          cmd = [ "${puppet-editor-services}/bin/puppet-languageserver" ];
         };
         helm_ls = {
           enable = true;