diff --git a/autopeptideml/data/h_param_search/gradboost_class.yml b/autopeptideml/data/h_param_search/gradboost_class.yml
index 3f4b6b5..0aa22e9 100644
--- a/autopeptideml/data/h_param_search/gradboost_class.yml
+++ b/autopeptideml/data/h_param_search/gradboost_class.yml
@@ -1,7 +1,7 @@
 n_estimators:
   type: int
-  min: 10
-  max: 1000
+  min: 8
+  max: 256
   log: True
 
 learning_rate:
diff --git a/autopeptideml/data/h_param_search/gradboost_reg.yml b/autopeptideml/data/h_param_search/gradboost_reg.yml
index cc9d978..ae59404 100644
--- a/autopeptideml/data/h_param_search/gradboost_reg.yml
+++ b/autopeptideml/data/h_param_search/gradboost_reg.yml
@@ -1,7 +1,7 @@
 n_estimators:
   type: int
-  min: 10
-  max: 1000
+  min: 8
+  max: 256
   log: True
 
 learning_rate:
diff --git a/autopeptideml/data/h_param_search/lightgbm_class.yml b/autopeptideml/data/h_param_search/lightgbm_class.yml
index 140f2f3..bcd0405 100644
--- a/autopeptideml/data/h_param_search/lightgbm_class.yml
+++ b/autopeptideml/data/h_param_search/lightgbm_class.yml
@@ -1,7 +1,7 @@
 n_estimators:
   type: int
-  min: 10
-  max: 500
+  min: 8
+  max: 256
   log: False
 
 class_weight:
@@ -11,13 +11,13 @@ class_weight:
 num_leaves:
   type: int
   min: 8
-  max: 1024
+  max: 256
   log: False
 
 max_depth:
   type: int
   min: 2
-  max: 10
+  max: 8
   log: False
 
 subsample:
diff --git a/autopeptideml/data/h_param_search/lightgbm_reg.yml b/autopeptideml/data/h_param_search/lightgbm_reg.yml
index 4cf9a97..1ce1f55 100644
--- a/autopeptideml/data/h_param_search/lightgbm_reg.yml
+++ b/autopeptideml/data/h_param_search/lightgbm_reg.yml
@@ -1,19 +1,19 @@
 n_estimators:
   type: int
-  min: 10
-  max: 500
+  min: 8
+  max: 256
   log: False
 
 num_leaves:
   type: int
   min: 8
-  max: 1024
+  max: 256
   log: False
 
 max_depth:
   type: int
   min: 2
-  max: 10
+  max: 8
   log: False
 
 subsample:
diff --git a/autopeptideml/data/h_param_search/rf_class.yml b/autopeptideml/data/h_param_search/rf_class.yml
index 94a9ae8..7cc7179 100644
--- a/autopeptideml/data/h_param_search/rf_class.yml
+++ b/autopeptideml/data/h_param_search/rf_class.yml
@@ -1,7 +1,7 @@
 n_estimators:
   type: int
   min: 10
-  max: 1000
+  max: 100
   log: True
 
 max_depth:
diff --git a/autopeptideml/data/h_param_search/rf_reg.yml b/autopeptideml/data/h_param_search/rf_reg.yml
index b95eb5b..7c17c73 100644
--- a/autopeptideml/data/h_param_search/rf_reg.yml
+++ b/autopeptideml/data/h_param_search/rf_reg.yml
@@ -1,7 +1,7 @@
 n_estimators:
   type: int
   min: 10
-  max: 1000
+  max: 100
   log: True
 
 max_depth:
diff --git a/autopeptideml/data/h_param_search/xgboost_class.yml b/autopeptideml/data/h_param_search/xgboost_class.yml
index 062f172..793a6c6 100644
--- a/autopeptideml/data/h_param_search/xgboost_class.yml
+++ b/autopeptideml/data/h_param_search/xgboost_class.yml
@@ -1,7 +1,7 @@
 n_estimators:
   type: int
-  min: 10
-  max: 1000
+  min: 8
+  max: 256
   log: True
 
 learning_rate:
@@ -87,7 +87,6 @@ grow_policy:
     - depthwise
     - lossguide
 
-
 sampling_method:
   type: fixed
   value: uniform
@@ -102,4 +101,4 @@ verbose:
 
 n_jobs:
   type: fixed
-  value: 1
\ No newline at end of file
+  value: 1
diff --git a/autopeptideml/data/h_param_search/xgboost_reg.yml b/autopeptideml/data/h_param_search/xgboost_reg.yml
index 5a54eab..2f2166a 100644
--- a/autopeptideml/data/h_param_search/xgboost_reg.yml
+++ b/autopeptideml/data/h_param_search/xgboost_reg.yml
@@ -1,7 +1,7 @@
 n_estimators:
   type: int
-  min: 10
-  max: 1000
+  min: 8
+  max: 256
   log: True
 
 learning_rate:
diff --git a/autopeptideml/train/architectures.py b/autopeptideml/train/architectures.py
index 444b74a..4512dac 100644
--- a/autopeptideml/train/architectures.py
+++ b/autopeptideml/train/architectures.py
@@ -12,7 +12,7 @@
 from skl2onnx import to_onnx
 
 
-SKLEARN_MODELS = ['knn', 'svm', 'rf', 'gradboost', 'logreg', 'linreg']
+SKLEARN_MODELS = ['knn', 'svm', 'rf', 'gradboost']
 ALL_MODELS = SKLEARN_MODELS + ['lightgbm', 'xgboost']
 
 
diff --git a/autopeptideml/train/trainer.py b/autopeptideml/train/trainer.py
index b3b672a..682fcf5 100644
--- a/autopeptideml/train/trainer.py
+++ b/autopeptideml/train/trainer.py
@@ -517,9 +517,12 @@ def hpo(
                               "Please try: `pip install optuna`")
         if verbose < 1:
             optuna.logging.set_verbosity(optuna.logging.ERROR)
-        elif verbose < 3:
+        elif verbose == 1:
             optuna.logging.set_verbosity(optuna.logging.WARNING)
-
+        elif verbose == 2:
+            optuna.logging.set_verbosity(optuna.logging.INFO)
+        elif verbose == 3:
+            optuna.logging.set_verbosity(optuna.logging.DEBUG)
         if isinstance(x, np.ndarray):
             x = {'default': x}
 
@@ -567,7 +570,7 @@ def hpo(
         )
         self.study.optimize(self._hpo_step, n_trials=self.n_trials,
                             callbacks=[callback],
-                            gc_after_trial=True, show_progress_bar=verbose == 2)
+                            gc_after_trial=True, show_progress_bar=verbose >= 2)
 
     @classmethod
     def load_from_db(