diff --git a/modules/file_manager.py b/modules/file_manager.py
index e7328833126163532313d14ef600345d381fcc28..f1eeb97e9d8aa38fabfd1b02278d5e1c613daf81 100644
--- a/modules/file_manager.py
+++ b/modules/file_manager.py
@@ -11,6 +11,8 @@ def open_yaml(file_name):
     except IOError:
         print("Error: Cannot open the required file: " + str(file_name))
         raise
+    finally:
+        input_file.close()
 
 def generate_file(filename, output_string):
     """