diff --git a/hepdata_converter/parsers/__init__.py b/hepdata_converter/parsers/__init__.py
index 75836f9..74e07e6 100644
--- a/hepdata_converter/parsers/__init__.py
+++ b/hepdata_converter/parsers/__init__.py
@@ -7,6 +7,7 @@
 
 import pkgutil
 import inspect
+from importlib.util import module_from_spec
 
 
 class BadFormat(Exception):
@@ -175,7 +176,9 @@ def parse(self, data_in, *args, **kwargs):
 
 # import all packages in the parsers package, so that Parser.get_specific_parser will recognise them
 for loader, name, is_pkg in pkgutil.walk_packages(__path__):
-    module = loader.find_module(name).load_module(name)
+    spec = loader.find_spec(name)
+    module = module_from_spec(spec)
+    spec.loader.exec_module(module)
 
     for name, value in inspect.getmembers(module):
         if name.startswith('__'):
diff --git a/hepdata_converter/writers/__init__.py b/hepdata_converter/writers/__init__.py
index 96624d0..d10fc86 100644
--- a/hepdata_converter/writers/__init__.py
+++ b/hepdata_converter/writers/__init__.py
@@ -6,6 +6,7 @@
 __all__ = []
 
 import abc
+from importlib.util import module_from_spec
 
 
 class Writer(GetConcreteSubclassMixin, OptionInitMixin, metaclass=abc.ABCMeta):
@@ -36,7 +37,9 @@ def write(self, data_in, data_out, *args, **kwargs):
 
 # import all packages in the parsers package, so that Writer.get_specific_writer will recognise them
 for loader, name, is_pkg in pkgutil.walk_packages(__path__):
-    module = loader.find_module(name).load_module(name)
+    spec = loader.find_spec(name)
+    module = module_from_spec(spec)
+    spec.loader.exec_module(module)
 
     for name, value in inspect.getmembers(module):
         if name.startswith('__'):