diff --git a/libraries/entropy.py b/libraries/entropy.py
index df9818b90..3867ea36b 100644
--- a/libraries/entropy.py
+++ b/libraries/entropy.py
@@ -8388,6 +8388,7 @@ class PackageMaskingParser:
             try:
                 f = open(mtimefile,"r")
                 mtime = float(f.readline().strip())
+                f.close()
                 # compare with current mtime
                 try:
                     currmtime = os.path.getmtime(maskfile)
diff --git a/libraries/entropyTools.py b/libraries/entropyTools.py
index ba783c42c..36de9ee59 100644
--- a/libraries/entropyTools.py
+++ b/libraries/entropyTools.py
@@ -1287,6 +1287,7 @@ def spawnFunction(f, *args, **kwds):
         f = os.fdopen(pread, 'rb')
         status, result = pickle.load(f)
         os.waitpid(pid, 0)
+        f.close()
         if status == 0:
             return result
         else: