diff --git a/action/config_template.py b/action/config_template.py
index c1fe36a..ca5e969 100644
--- a/action/config_template.py
+++ b/action/config_template.py
@@ -865,9 +865,20 @@ class ActionModule(ActionBase):
             ).decode('utf-8')
 
         self._templar.environment.loader.searchpath = _vars['searchpath']
-        self._templar.available_variables = temp_vars
+
+        if LooseVersion(__ansible_version__) < LooseVersion("2.9"):
+            self._templar.set_available_variables(temp_vars)
+        else:
+            self._templar.available_variables = temp_vars
+
         resultant = self._check_templar(data=template_data)
 
+        if LooseVersion(__ansible_version__) < LooseVersion("2.9"):
+            # Access to protected method is unavoidable in Ansible
+            self._templar.set_available_variables(
+                self._templar._available_variables
+            )
+
         type_merger = getattr(self, CONFIG_TYPES.get(_vars['config_type']))
         resultant, config_base = type_merger(
             config_overrides=_vars['config_overrides'],