diff --git a/polybar-scripts/openweathermap-detailed/README.md b/polybar-scripts/openweathermap-detailed/README.md
index b0b2c25..6e3e0b7 100644
--- a/polybar-scripts/openweathermap-detailed/README.md
+++ b/polybar-scripts/openweathermap-detailed/README.md
@@ -4,7 +4,7 @@ A weather script that displays some weather information.
 
 It shows icons, temperatures and text for the current weather. The script can be easily modified to display a forecast. Look at the commented out line.
 
-If `CITY` is left empty, the location is retrieved via the Mozilla Location API.  
+If `CITY` is left empty, the location is retrieved via the Mozilla Location API. An ID must be specified here. For example ID of Berlin is `2950159`.
 
 Change these values:
 
diff --git a/polybar-scripts/openweathermap-forecast/README.md b/polybar-scripts/openweathermap-forecast/README.md
index 84c5fff..0c42c10 100644
--- a/polybar-scripts/openweathermap-forecast/README.md
+++ b/polybar-scripts/openweathermap-forecast/README.md
@@ -4,7 +4,7 @@ A weather script that displays a weather forecast.
 
 It shows icons and temperatures for the current weather and the 3 hour forecast.
 
-If `CITY` is left empty, the location is retrieved via the Mozilla Location API.  
+If `CITY` is left empty, the location is retrieved via the Mozilla Location API. An ID must be specified here. For example ID of Berlin is `2950159`.
 
 Change these values:
 
diff --git a/polybar-scripts/openweathermap-fullfeatured/README.md b/polybar-scripts/openweathermap-fullfeatured/README.md
index c23b8f4..48bfc8b 100644
--- a/polybar-scripts/openweathermap-fullfeatured/README.md
+++ b/polybar-scripts/openweathermap-fullfeatured/README.md
@@ -4,7 +4,7 @@ A weather script that shows a lot of information.
 
 It shows icons and temperatures for the current weather and the 3 hour forecast. It displays information about the next sunrise or sunset.
 
-If `CITY` is left empty, the location is retrieved via the Mozilla Location API.  
+If `CITY` is left empty, the location is retrieved via the Mozilla Location API. An ID must be specified here. For example ID of Berlin is `2950159`.
 
 Change these values:
 
diff --git a/polybar-scripts/openweathermap-simple/README.md b/polybar-scripts/openweathermap-simple/README.md
index a338155..582e539 100644
--- a/polybar-scripts/openweathermap-simple/README.md
+++ b/polybar-scripts/openweathermap-simple/README.md
@@ -4,7 +4,7 @@ A weather script that displays some weather information.
 
 It shows icons and temperatures for the current weather. The script can be easily modified to display a forecast. Look at the commented out line.
 
-If `CITY` is left empty, the location is retrieved via the Mozilla Location API.  
+If `CITY` is left empty, the location is retrieved via the Mozilla Location API. An ID must be specified here. For example ID of Berlin is `2950159`.
 
 Change these values: