diff --git a/src/dependency_injector/containers.pyx b/src/dependency_injector/containers.pyx
index 818fd61a..99762da2 100644
--- a/src/dependency_injector/containers.pyx
+++ b/src/dependency_injector/containers.pyx
@@ -317,6 +317,10 @@ class DynamicContainer(Container):
 
     def init_resources(self, resource_type=providers.Resource):
         """Initialize all container resources."""
+
+        if not issubclass(resource_type, providers.Resource):
+            raise TypeError("resource_type must be a subclass of Resource provider")
+
         futures = []
 
         for provider in self.traverse(types=[resource_type]):
@@ -330,6 +334,10 @@ class DynamicContainer(Container):
 
     def shutdown_resources(self, resource_type=providers.Resource):
         """Shutdown all container resources."""
+
+        if not issubclass(resource_type, providers.Resource):
+            raise TypeError("resource_type must be a subclass of Resource provider")
+
         def _independent_resources(resources):
             for resource in resources:
                 for other_resource in resources:
diff --git a/tests/unit/containers/instance/test_main_py2_py3.py b/tests/unit/containers/instance/test_main_py2_py3.py
index ddd61de9..0c19fa36 100644
--- a/tests/unit/containers/instance/test_main_py2_py3.py
+++ b/tests/unit/containers/instance/test_main_py2_py3.py
@@ -325,6 +325,19 @@ def test_init_shutdown_nested_resources():
     assert _init2.shutdown_counter == 2
 
 
+def test_init_shutdown_resources_wrong_type() -> None:
+    class Container(containers.DeclarativeContainer):
+        pass
+
+    c = Container()
+
+    with raises(TypeError, match=r"resource_type must be a subclass of Resource provider"):
+        c.init_resources(int)  # type: ignore[arg-type]
+
+    with raises(TypeError, match=r"resource_type must be a subclass of Resource provider"):
+        c.shutdown_resources(int)  # type: ignore[arg-type]
+
+
 def test_reset_singletons():
     class SubSubContainer(containers.DeclarativeContainer):
         singleton = providers.Singleton(object)