diff --git a/ISBPL.java b/ISBPL.java
index 72c00b1..f32b8b3 100644
--- a/ISBPL.java
+++ b/ISBPL.java
@@ -1848,7 +1848,6 @@ public class ISBPL {
     }
     
     private static String readFile(File f) throws IOException {
-        //noinspection resource
         FileInputStream fis = new FileInputStream(f);
         ByteArrayOutputStream bytes = new ByteArrayOutputStream();
         byte[] currentBytes = new byte[4096];
@@ -1856,6 +1855,7 @@ public class ISBPL {
         while ((len = fis.read(currentBytes)) > 0) {
             bytes.write(currentBytes, 0, len);
         }
+        fis.close();
         return bytes.toString();
     }