diff --git a/HPC_setup/requirements_HDFML_additionals.txt b/HPC_setup/requirements_HDFML_additionals.txt
index dadd8403ce262dca4851dd87ad4793620bfe7d1b..e811df8b5eab76b92cabb4bde03f17c3bde06f47 100644
--- a/HPC_setup/requirements_HDFML_additionals.txt
+++ b/HPC_setup/requirements_HDFML_additionals.txt
@@ -2,9 +2,11 @@ astropy==4.1
 bottleneck==1.3.2
 cached-property==1.5.2
 iniconfig==1.1.1
-multiprocess==0.70.12.2
+multiprocess==0.70.11
 ordered-set==4.0.2
 pathos==0.2.7
+pox==0.2.9
+ppft==1.6.6.3
 pyshp==2.1.3
 pytest-html==3.1.1
 pytest-lazy-fixture==0.6.3
diff --git a/HPC_setup/requirements_JUWELS_additionals.txt b/HPC_setup/requirements_JUWELS_additionals.txt
index dadd8403ce262dca4851dd87ad4793620bfe7d1b..e811df8b5eab76b92cabb4bde03f17c3bde06f47 100644
--- a/HPC_setup/requirements_JUWELS_additionals.txt
+++ b/HPC_setup/requirements_JUWELS_additionals.txt
@@ -2,9 +2,11 @@ astropy==4.1
 bottleneck==1.3.2
 cached-property==1.5.2
 iniconfig==1.1.1
-multiprocess==0.70.12.2
+multiprocess==0.70.11
 ordered-set==4.0.2
 pathos==0.2.7
+pox==0.2.9
+ppft==1.6.6.3
 pyshp==2.1.3
 pytest-html==3.1.1
 pytest-lazy-fixture==0.6.3
diff --git a/mlair/data_handler/default_data_handler.py b/mlair/data_handler/default_data_handler.py
index 1bcc1491652c630a0059e00ee92406ca3d4df495..300e0435c4e8441e299675319e2c72604ebb3200 100644
--- a/mlair/data_handler/default_data_handler.py
+++ b/mlair/data_handler/default_data_handler.py
@@ -125,8 +125,9 @@ class DefaultDataHandler(AbstractDataHandler):
 
     def get_data(self, upsampling=False, as_numpy=True):
         self._load()
-        X = self.get_X(upsampling, as_numpy)
-        Y = self.get_Y(upsampling, as_numpy)
+        as_numpy_X, as_numpy_Y = as_numpy if isinstance(as_numpy, tuple) else (as_numpy, as_numpy)
+        X = self.get_X(upsampling, as_numpy_X)
+        Y = self.get_Y(upsampling, as_numpy_Y)
         self._reset_data()
         return X, Y
 
diff --git a/mlair/run_modules/post_processing.py b/mlair/run_modules/post_processing.py
index ed541a66b992201cd46aac22e0df3267e786d693..2be09830438310fcd4ca37409fdd109314b5a202 100644
--- a/mlair/run_modules/post_processing.py
+++ b/mlair/run_modules/post_processing.py
@@ -1329,8 +1329,9 @@ def f_proc_make_prediction(data, frequency, time_dimension, forecast_indicator,
 
     prediction_maker = MakePrediction(model, window_lead_time, ols_model)
 
-    input_data = data.get_X()
-    target_data = data.get_Y(as_numpy=False)
+    input_data, target_data = data.get_data(as_numpy=(True, False))
+    # input_data = data.get_X()
+    # target_data = data.get_Y(as_numpy=False)
     observation_data = data.get_observation()
 
     # get scaling parameters
diff --git a/requirements.txt b/requirements.txt
index 3a669e606e48d89dfb6fae673d97bd83b8fb7722..1ba41d28f879fac27f63d9743f886492dc1abc86 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,12 +9,14 @@ keras_nightly==2.5.0.dev2021032900
 locket==0.2.1
 matplotlib==3.3.4
 mock==4.0.3
-multiprocess==0.70.12.2
+multiprocess==0.70.11
 netcdf4==1.5.8
 numpy==1.19.5
 pandas==1.1.5
 partd==1.2.0
 pathos==0.2.7
+pox==0.2.9
+ppft==1.6.6.3
 psutil==5.8.0
 pydot==1.4.2
 pytest==6.2.2