diff --git a/riverdriver/riverdatabasesql/river_database_sql_driver.go b/riverdriver/riverdatabasesql/river_database_sql_driver.go
index 84821f76..41e985a8 100644
--- a/riverdriver/riverdatabasesql/river_database_sql_driver.go
+++ b/riverdriver/riverdatabasesql/river_database_sql_driver.go
@@ -981,6 +981,7 @@ type templateReplaceWrapper struct {
 
 func (w templateReplaceWrapper) ExecContext(ctx context.Context, sql string, args ...interface{}) (sql.Result, error) {
 	sql, args = w.replacer.Run(ctx, sql, args)
+	convertDurationToInterval(sql, args)
 	return w.dbtx.ExecContext(ctx, sql, args...)
 }
 
@@ -1107,3 +1108,17 @@ func schemaTemplateParam(ctx context.Context, schema string) context.Context {
 		"schema": {Value: schema},
 	}, nil)
 }
+
+// convertDurationToInterval converts Go's time.Duration to PostgreSQL's
+func convertDurationToInterval(sql string, args []any) {
+	if !strings.Contains(sql, "interval") {
+		return
+	}
+
+	for i, arg := range args {
+		if d, ok := arg.(time.Duration); ok {
+			pgInterval := fmt.Sprintf("%d seconds", int(d.Seconds()))
+			args[i] = pgInterval
+		}
+	}
+}
diff --git a/riverdriver/riverdatabasesql/river_database_sql_driver_test.go b/riverdriver/riverdatabasesql/river_database_sql_driver_test.go
index 209b009b..5c24d754 100644
--- a/riverdriver/riverdatabasesql/river_database_sql_driver_test.go
+++ b/riverdriver/riverdatabasesql/river_database_sql_driver_test.go
@@ -5,6 +5,7 @@ import (
 	"database/sql"
 	"errors"
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/require"
 
@@ -131,3 +132,34 @@ func TestSchemaTemplateParam(t *testing.T) {
 		require.Equal(t, "SELECT 1 FROM custom_schema.river_job", updatedSQL)
 	})
 }
+
+func TestConvertDurationToInterval(t *testing.T) {
+	t.Parallel()
+
+	testCases := []struct {
+		Desc         string
+		InputSQL     string
+		InputArgs    []any
+		ExpectedArgs []any
+	}{
+		{
+			Desc: "Convert duration to interval",
+			InputSQL: `
+			INSERT INTO river_leader(leader_id, elected_At, expires_at)
+				VALUES($1, now(), now() + $2::interval)
+			ON CONFICT (name)
+				DO NOTHING
+			`,
+			InputArgs:    []any{"river", 15 * time.Second},
+			ExpectedArgs: []any{"river", "15 seconds"},
+		},
+	}
+	for _, tt := range testCases {
+		t.Run(tt.Desc, func(t *testing.T) {
+			t.Parallel()
+
+			convertDurationToInterval(tt.InputSQL, tt.InputArgs)
+			require.Equal(t, tt.InputArgs, tt.ExpectedArgs)
+		})
+	}
+}