diff --git a/src/orca/generator.py b/src/orca/generator.py
index e989709929968662240e63229f7e6e58ca9738e7..e9a9d89de137e42411dbff33277a1f39cf26a854 100644
--- a/src/orca/generator.py
+++ b/src/orca/generator.py
@@ -78,7 +78,7 @@ class Generator:
         self._activeProgressBars = {}
         self._methodsDict = {}
         for method in \
-            [z for z in [getattr(self, y).__get__(self, self.__class__) for y in [x for x in dir(self) if x.startswith(METHOD_PREFIX)]] if isinstance(z, collections.Callable)]:
+            [z for z in [getattr(self, y).__get__(self, self.__class__) for y in [x for x in dir(self) if x.startswith(METHOD_PREFIX)]] if isinstance(z, collections.abc.Callable)]:
             name = method.__name__[len(METHOD_PREFIX):]
             name = name[0].lower() + name[1:]
             self._methodsDict[name] = method