diff --git a/survey_tools.py b/survey_tools.py
index b9e2548..ca2e07f 100644
--- a/survey_tools.py
+++ b/survey_tools.py
@@ -174,4 +174,4 @@ def update_survey_output(df, output_dir):
         master = master[other_cols + elev_cols]
 
         # Export updated results
-        master.to_csv(csv_name, index=False)
+        master.to_csv(csv_name, index=False, float_format='%0.3f')