diff --git a/src/core/injections/controller/controller.py b/src/core/injections/controller/controller.py
index 0701ea9be0..e8ad20afbb 100644
--- a/src/core/injections/controller/controller.py
+++ b/src/core/injections/controller/controller.py
@@ -478,18 +478,18 @@ def host_injection(url, http_request_method, filename, timesec):
   else:
     # User-Agent HTTP header injection
     if settings.USER_AGENT_INJECTION or \
-      menu.options.test_parameter and settings.USER_AGENT.lower() in menu.options.test_parameter.lower() or \
-      menu.options.skip_parameter and settings.USER_AGENT.lower() not in menu.options.skip_parameter.lower():
+      (type(menu.options.test_parameter) is str and settings.USER_AGENT.lower() in menu.options.test_parameter.lower()) or \
+      (type(menu.options.skip_parameter) is str and settings.USER_AGENT.lower() not in menu.options.skip_parameter.lower()):
       user_agent_injection(url, http_request_method, filename, timesec)
     # Referer HTTP header injection
     if settings.REFERER_INJECTION or \
-      menu.options.test_parameter and settings.REFERER.lower() in menu.options.test_parameter.lower() or \
-      menu.options.skip_parameter and settings.REFERER.lower() not in menu.options.skip_parameter.lower():
+      (type(menu.options.test_parameter) is str and settings.REFERER.lower() in menu.options.test_parameter.lower()) or \
+      (type(menu.options.skip_parameter) is str and settings.REFERER.lower() not in menu.options.skip_parameter.lower()):
       referer_injection(url, http_request_method, filename, timesec)
     # Host HTTP header injection
     if settings.HOST_INJECTION or \
-      menu.options.test_parameter and settings.HOST.lower() in menu.options.test_parameter.lower() or \
-      menu.options.skip_parameter and settings.HOST.lower() not in menu.options.skip_parameter.lower():
+      (type(menu.options.test_parameter) is str and settings.HOST.lower() in menu.options.test_parameter.lower()) or \
+      (type(menu.options.skip_parameter) is str and settings.HOST.lower() not in menu.options.skip_parameter.lower()):
       host_injection(url, http_request_method, filename, timesec)
 
 """
diff --git a/src/utils/settings.py b/src/utils/settings.py
index 7d9a9b7b13..cdeadfc894 100755
--- a/src/utils/settings.py
+++ b/src/utils/settings.py
@@ -262,7 +262,7 @@ def sys_argv_errors():
 DESCRIPTION = "The command injection exploiter"
 AUTHOR  = "Anastasios Stasinopoulos"
 VERSION_NUM = "4.0"
-REVISION = "99"
+REVISION = "100"
 STABLE_RELEASE = False
 VERSION = "v"
 if STABLE_RELEASE: