diff --git a/internal/csvparser/parser.go b/internal/csvparser/parser.go
index a125eb0..a5a15dc 100644
--- a/internal/csvparser/parser.go
+++ b/internal/csvparser/parser.go
@@ -18,6 +18,7 @@ func ParseFile(file string) ([]CsvLine, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer csvfile.Close()
 
 	r := csv.NewReader(csvfile)
 	var lines []CsvLine