diff --git a/influxgraph.py b/influxgraph.py
index b71737d..04745f3 100644
--- a/influxgraph.py
+++ b/influxgraph.py
@@ -187,7 +187,7 @@ class InfluxGraph:
         df = self.influx_data_getter.get_curves_data_frame(queried_variables, [start, end], interval)
 
         mem = io.BytesIO()
-        df.to_csv(mem, sep="\t", index=False)
+        df.to_csv(mem, sep="\t", index=False, float_format="%.15g")
         mem.seek(0)
         return mem