diff --git a/bin/billing_monthly_cronjob b/bin/billing_monthly_cronjob
index 09a4fc28abceef8b10562675596e0551901271e9..fc804a9599bf2cd16b1c2a09aeceae567182408c 100755
--- a/bin/billing_monthly_cronjob
+++ b/bin/billing_monthly_cronjob
@@ -101,8 +101,9 @@ class Plan
 
 		params = [RENEW_UNTIL, customer_id, expires_at]
 		db.exec_params(<<-SQL, params)
-		  UPDATE plan_log SET expires_at=$1
-		  WHERE customer_id=$2 AND expires_at=$3
+			UPDATE plan_log
+			SET date_range=range_merge(date_range, tsrange('now', $1))
+			WHERE customer_id=$2 AND date_range -|- tsrange($3, $3, '[]')
 		SQL
 	end
 end
diff --git a/bin/process_pending_btc_transactions b/bin/process_pending_btc_transactions
index ae922a8b3f3c422d1696a0a0c9510ba4eb839fb6..e51b0244da98d9036143586bb95c2bb4741411f8 100755
--- a/bin/process_pending_btc_transactions
+++ b/bin/process_pending_btc_transactions
@@ -122,9 +122,9 @@ class Plan
 		params = [@customer.id, name, start, expire]
 		DB.exec_params(<<-SQL, params)
 			INSERT INTO plan_log
-				(customer_id, plan_name, starts_at, expires_at)
+				(customer_id, plan_name, date_range)
 			VALUES
-				($1, $2, $3, $4)
+				($1, $2, tsrange($3, $4))
 		SQL
 	end
 
diff --git a/config.ru b/config.ru
index 8f625991916c4406ee6841e0e6411be11793b29b..fbb010de4cc62dd2ed48ab26f9c70a25f2c86fb8 100644
--- a/config.ru
+++ b/config.ru
@@ -63,7 +63,7 @@ class Plan
 
 	def activate(customer_id, months)
 		DB.exec_params(
-			"INSERT INTO plan_log VALUES ($1, $2, $3, $4)",
+			"INSERT INTO plan_log VALUES ($1, $2, tsrange($3, $4))",
 			[customer_id, @plan[:name], Time.now, Date.today >> months]
 		)
 		true
diff --git a/schemas b/schemas
index 3e0d7e8ae7193f567294036c3235d50ed318b945..5573078307ccb4fed4dec6e95a2bf38e91385424 160000
--- a/schemas
+++ b/schemas
@@ -1 +1 @@
-Subproject commit 3e0d7e8ae7193f567294036c3235d50ed318b945
+Subproject commit 5573078307ccb4fed4dec6e95a2bf38e91385424