diff --git a/toolbox.py b/toolbox.py
index 4170852..c6dfadf 100644
--- a/toolbox.py
+++ b/toolbox.py
@@ -50,7 +50,7 @@ def __init__(self, table_name, GEOGRIDDATA_varname = 'GEOGRIDDATA', GEOGRID_varn
 		self.table_name = table_name
 		self.quietly = quietly
 
-		self.sleep_time = 0.1
+		self.sleep_time = 0.5
 		self.nAttempts = 5
 
 		self.front_end_url   = 'https://cityscope.media.mit.edu/CS_cityscopeJS/?cityscope='+self.table_name