diff --git a/src/cpl_reactive_extensions/internal/operator_subscriber.py b/src/cpl_reactive_extensions/internal/operator_subscriber.py
index f81be949..77ba0cd7 100644
--- a/src/cpl_reactive_extensions/internal/operator_subscriber.py
+++ b/src/cpl_reactive_extensions/internal/operator_subscriber.py
@@ -1,7 +1,7 @@
 from typing import Callable
 
 from cpl_core.type import T
-from cpl_reactive_extensions.abc import Observer
+from cpl_reactive_extensions.abc.observer import Observer
 from cpl_reactive_extensions.internal.subscriber import Subscriber
 
 
diff --git a/src/cpl_reactive_extensions/operators/debounce_time.py b/src/cpl_reactive_extensions/operators/debounce_time.py
index 8ea1c421..4a0ccfd8 100644
--- a/src/cpl_reactive_extensions/operators/debounce_time.py
+++ b/src/cpl_reactive_extensions/operators/debounce_time.py
@@ -1,7 +1,7 @@
 from typing import Optional
 
 from cpl_core.type import T, Number
-from cpl_reactive_extensions.abc import SchedulerAction
+from cpl_reactive_extensions.abc.scheduler_action import SchedulerAction
 from cpl_reactive_extensions.internal.operator_subscriber import OperatorSubscriber
 from cpl_reactive_extensions.internal.subscriber import Subscriber
 from cpl_reactive_extensions.internal.subscription import Subscription
diff --git a/unittests/unittests_reactive_extenstions/observable_operator_test_case.py b/unittests/unittests_reactive_extenstions/observable_operator_test_case.py
index 413a82a7..d3bb257c 100644
--- a/unittests/unittests_reactive_extenstions/observable_operator_test_case.py
+++ b/unittests/unittests_reactive_extenstions/observable_operator_test_case.py
@@ -4,7 +4,7 @@ import unittest
 
 from cpl_core.console import Console
 from cpl_reactive_extensions.observable import Observable
-from cpl_reactive_extensions.operators import debounce_time
+from cpl_reactive_extensions.operators.debounce_time import debounce_time
 from cpl_reactive_extensions.subject.subject import Subject
 from cpl_reactive_extensions.interval import Interval
 from cpl_reactive_extensions.operators.take import take