diff --git a/files/gvm_library.py b/files/gvm_library.py
index bb1789379e4b33808622afecfd27e066013ba5f9..e5fb7906059be43eaeca412571b1026713967e3c 100644
--- a/files/gvm_library.py
+++ b/files/gvm_library.py
@@ -73,10 +73,10 @@ class Target:
     """
     
     def __init__(self,
-                 name: str, 
-                 id: str,
-                 in_use: str,
-                 hosts: str,
+                 name: str = "", 
+                 id: str = "",
+                 in_use: str = "",
+                 hosts: str = "",
                  client = None):
         self.client = client
         self.name = name
@@ -122,11 +122,11 @@ class Task:
     """
     
     def __init__(self, 
-                 name: str, 
-                 id: str,
+                 name: str = "", 
+                 id: str = "",
                  client = None,
-                 in_use: str = None,
-                 status: str = None,
+                 in_use: str = "",
+                 status: str = "",
                  report_id: str = None):
         self.client = client
         self.name = name