diff --git a/ampel-firmware/web_server.cpp b/ampel-firmware/web_server.cpp
index e84037b960403b1f434b265d947e3fb6b4dd80c6..c25f758c7ed30e43f98f1199a20969625f9ad0e9 100644
--- a/ampel-firmware/web_server.cpp
+++ b/ampel-firmware/web_server.cpp
@@ -131,11 +131,11 @@ namespace web_server {
         ".then(_=>Plotly.newPlot('graph',data,layout,{displaylogo:false}))"
         ".catch(console.error);"
         "xs=[];y1=[];y2=[];y3=[];"
-        "m='lines+markers';"
-        "s={symbol:123};" // diamond-tall-open from https://plotly.com/python/marker-style/
-        "data=[{x:xs,y:y1,type:'scatter',name:'CO<sub>2</sub>',line:{color:'#2ca02c'},mode:m,marker:s},"
-        "{x:xs,y:y2,type:'scatter',name:'Temperature',yaxis:'y2',line:{color:'#ff7f0e',dash:'dot'},mode:m,marker:s},"
-        "{x:xs,y:y3,type:'scatter',name:'Humidity',yaxis:'y3',line:{color:'#1f77b4',dash:'dot'},mode:m,marker:s}];"
+        "d={x:xs,type:'scatter',mode:'lines+markers',marker:{symbol:123}};" // diamond-tall-open from https://plotly.com/python/marker-style/
+        "data = ["
+        "{...d,...{y:y1,name:'CO<sub>2</sub>',line:{color:'#2ca02c'}}},"
+        "{...d,...{y:y2,name:'Temperature',yaxis:'y2',line:{color:'#ff7f0e',dash:'dot'}}},"
+        "{...d,...{y:y3,name:'Humidity',yaxis:'y3',line:{color:'#1f77b4',dash:'dot'}}}];"
         "layout={height:600,title:'%s',legend:{xanchor:'right',x:0.2,y:1.0},"
         "xaxis:{domain:[0.0,0.85]},yaxis:{ticksuffix:'ppm',range:[0,2000],dtick:200},"
         "yaxis2:{overlaying:'y',side:'right',ticksuffix:'°C',position:0.9,anchor:'free',range:[0,30],dtick:3},"
@@ -202,7 +202,7 @@ namespace web_server {
     //NOTE: Splitting in multiple parts in order to use less RAM. Higher than 2000 apparently crashes the ESP8266
     char content[1700];
     // Current size (with Lorawan, timesteps and long thing name):
-    //    INFO - Header size : 1269 - Body1 size : 1259 - Body2 size : 1620 - Script size : 1485
+    //    INFO - Header size : 1269 - Body1 size : 1259 - Body2 size : 1620 - Script size : 1496
 
     snprintf_P(content, sizeof(content), header_template, sensor::co2, config::ampel_name(), wifi::local_ip);