diff --git a/src/main/java/uk/ac/ebi/pride/gui/util/Hash.java b/src/main/java/uk/ac/ebi/pride/gui/util/Hash.java
index 0acf1ac6..14e7daea 100644
--- a/src/main/java/uk/ac/ebi/pride/gui/util/Hash.java
+++ b/src/main/java/uk/ac/ebi/pride/gui/util/Hash.java
@@ -13,7 +13,12 @@ public class Hash {
     private final static Logger LOGGER = LoggerFactory.getLogger(Hash.class);
 
     public static String getSha1Checksum(File file) throws IOException {
-        return DigestUtils.sha1Hex(new FileInputStream(file));
+
+        FileInputStream fileInputStream = new FileInputStream(file);
+        String checksum = DigestUtils.sha1Hex(fileInputStream);
+        fileInputStream.close();
+
+        return checksum;
     }
 
     public static String getSha256Checksum(String str) {