diff --git a/lib/core/settings.py b/lib/core/settings.py
index 51c7e1e19..aa14734c0 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -106,7 +106,7 @@ MAX_BUFFERED_PARTIAL_UNION_LENGTH = 1024
 METADB_SUFFIX = "_masterdb"
 
 # Minimum time response set needed for time-comparison based on standard deviation
-MIN_TIME_RESPONSES = 15
+MIN_TIME_RESPONSES = 30
 
 # Minimum comparison ratio set needed for searching valid union column number based on standard deviation
 MIN_UNION_RESPONSES = 5