diff --git a/src/modules/wayfire/backend.cpp b/src/modules/wayfire/backend.cpp
index 42976d20..037a61e1 100644
--- a/src/modules/wayfire/backend.cpp
+++ b/src/modules/wayfire/backend.cpp
@@ -347,10 +347,13 @@ auto IPC::update_state_handler(const std::string& event, const Json::Value& data
 
   if (event == "output-wset-changed") {
     // data: { event, new-wset: wset.name, output: id, new-wset-data: wset, output-data: output }
-    auto& output = state.outputs.at(data["output-data"]["name"].asString());
-    auto wset_idx = data["new-wset-data"]["index"].asUInt();
-    state.wsets.at(wset_idx).output = output;
-    output.wset_idx = wset_idx;
+    try {
+	  auto& output = state.outputs.at(data["output-data"]["name"].asString());
+	  auto wset_idx = data["new-wset-data"]["index"].asUInt();
+	  state.wsets.at(wset_idx).output = output;
+	  output.wset_idx = wset_idx;
+	} catch (const std::exception&) {
+	} 
     return;
   }