diff --git a/types/daterange.go b/types/daterange.go
index 5ac1089..ef46d3f 100644
--- a/types/daterange.go
+++ b/types/daterange.go
@@ -91,9 +91,10 @@ func (dr *DateRange) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
-func (dr *DateRange) SetLower(lower Date, bound pgtype.BoundType) {
+func (dr *DateRange) SetLower(lower Date, bound ...pgtype.BoundType) {
+	bound = append(bound, pgtype.Inclusive)
 	dr.Range.Lower = lower
-	dr.Range.LowerType = bound
+	dr.Range.LowerType = bound[0]
 }
 
 func (dr *DateRange) SetLowerUnbounded() {
@@ -101,9 +102,10 @@ func (dr *DateRange) SetLowerUnbounded() {
 	dr.Range.LowerType = pgtype.Unbounded
 }
 
-func (dr *DateRange) SetUpper(upper Date, bound pgtype.BoundType) {
+func (dr *DateRange) SetUpper(upper Date, bound ...pgtype.BoundType) {
+	bound = append(bound, pgtype.Inclusive)
 	dr.Range.Upper = upper
-	dr.Range.UpperType = bound
+	dr.Range.UpperType = bound[0]
 }
 
 func (dr *DateRange) SetUpperUnbounded() {
diff --git a/types/datetimerange.go b/types/datetimerange.go
index 419a035..5927d8d 100644
--- a/types/datetimerange.go
+++ b/types/datetimerange.go
@@ -91,9 +91,10 @@ func (dr *DateTimeRange) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
-func (dr *DateTimeRange) SetLower(lower DateTime, bound pgtype.BoundType) {
+func (dr *DateTimeRange) SetLower(lower DateTime, bound ...pgtype.BoundType) {
+	bound = append(bound, pgtype.Inclusive)
 	dr.Range.Lower = lower
-	dr.Range.LowerType = bound
+	dr.Range.LowerType = bound[0]
 }
 
 func (dr *DateTimeRange) SetLowerUnbounded() {
@@ -101,9 +102,10 @@ func (dr *DateTimeRange) SetLowerUnbounded() {
 	dr.Range.LowerType = pgtype.Unbounded
 }
 
-func (dr *DateTimeRange) SetUpper(upper DateTime, bound pgtype.BoundType) {
+func (dr *DateTimeRange) SetUpper(upper DateTime, bound ...pgtype.BoundType) {
+	bound = append(bound, pgtype.Inclusive)
 	dr.Range.Upper = upper
-	dr.Range.UpperType = bound
+	dr.Range.UpperType = bound[0]
 }
 
 func (dr *DateTimeRange) SetUpperUnbounded() {