diff --git a/src/Thresholds.cpp b/src/Thresholds.cpp
index 610e68e..ee0456d 100644
--- a/src/Thresholds.cpp
+++ b/src/Thresholds.cpp
@@ -339,14 +339,14 @@
     }
     if (pair == nullptr)
     {
-        pair = &timers.emplace_back(timerUsed, boost::asio::deadline_timer(io));
+        pair = &timers.emplace_back(timerUsed, boost::asio::steady_timer(io));
     }
 
     pair->first.used = true;
     pair->first.level = threshold.level;
     pair->first.direction = threshold.direction;
     pair->first.assert = assert;
-    pair->second.expires_from_now(boost::posix_time::seconds(waitTime));
+    pair->second.expires_from_now(std::chrono::seconds(waitTime));
     pair->second.async_wait([weakSensor, pair, threshold, assert,
                              assertValue](boost::system::error_code ec) {
         auto sensorPtr = weakSensor.lock();