diff --git a/environment-dev.yml b/environment-dev.yml
index 3d44d43..bac0d14 100644
--- a/environment-dev.yml
+++ b/environment-dev.yml
@@ -11,4 +11,3 @@ dependencies:
   - cosapp
   - numpy
   - cosapp_fmu
-  - maintenance
diff --git a/requirements-ci.txt b/requirements-ci.txt
index 0ecb316..f343f03 100644
--- a/requirements-ci.txt
+++ b/requirements-ci.txt
@@ -1,4 +1,4 @@
-cosapp==0.14.1
+cosapp==0.15.0
 ipython
 matplotlib==3.6.3
 numpy
diff --git a/requirements.txt b/requirements.txt
index 40b95eb..66b82a3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-cosapp==0.14.1
+cosapp==0.15.0
 ipython
 matplotlib==3.6.3
 numpy
@@ -18,6 +18,5 @@ flake8
 isort
 black
 pre-commit
-maintenance @ git+ssh://git@github.com/twiinIT/maintenance.git@main
 cosapp_fmu @ git+ssh://git@github.com/twiinIT/cosapp-fmu.git@master
 OMPython
diff --git a/rocket_twin/tests/test_controller_fmu.py b/rocket_twin/tests/test_controller_fmu.py
index 7f651e1..2c0f34f 100644
--- a/rocket_twin/tests/test_controller_fmu.py
+++ b/rocket_twin/tests/test_controller_fmu.py
@@ -1,7 +1,7 @@
 import numpy as np
 from cosapp.drivers import RungeKutta
 from cosapp.recorders import DataFrameRecorder
-from maintenance.utils import swap_system
+from cosapp.utils import swap_system
 
 from rocket_twin.systems import ControllerFMU, Station