diff --git a/src/components/ble/weather/WeatherService.cpp b/src/components/ble/weather/WeatherService.cpp
index d9e80be8..513bb2a1 100644
--- a/src/components/ble/weather/WeatherService.cpp
+++ b/src/components/ble/weather/WeatherService.cpp
@@ -26,7 +26,7 @@ int WeatherCallback(uint16_t /*connHandle*/, uint16_t /*attrHandle*/, struct ble
 
 namespace Pinetime {
   namespace Controllers {
-    WeatherService::WeatherService(DateTime& dateTimeController) : dateTimeController(dateTimeController) {
+    WeatherService::WeatherService(const DateTime& dateTimeController) : dateTimeController(dateTimeController) {
       nullHeader = &nullTimelineheader;
       nullTimelineheader->timestamp = 0;
     }
diff --git a/src/components/ble/weather/WeatherService.h b/src/components/ble/weather/WeatherService.h
index d1c347a9..609e8760 100644
--- a/src/components/ble/weather/WeatherService.h
+++ b/src/components/ble/weather/WeatherService.h
@@ -40,7 +40,7 @@ namespace Pinetime {
 
     class WeatherService {
     public:
-      explicit WeatherService(DateTime& dateTimeController);
+      explicit WeatherService(const DateTime& dateTimeController);
 
       void Init();
 
@@ -129,7 +129,7 @@ namespace Pinetime {
 
       uint16_t eventHandle {};
 
-      Pinetime::Controllers::DateTime& dateTimeController;
+      const Pinetime::Controllers::DateTime& dateTimeController;
 
       std::vector<std::unique_ptr<WeatherData::TimelineHeader>> timeline;
       std::unique_ptr<WeatherData::TimelineHeader> nullTimelineheader = std::make_unique<WeatherData::TimelineHeader>();