diff --git a/_proc/99_unitTests.ipynb b/_proc/99_unitTests.ipynb
index 3967bf5..9a07e21 100644
--- a/_proc/99_unitTests.ipynb
+++ b/_proc/99_unitTests.ipynb
@@ -4334,7 +4334,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "\n",
-    "lowerBoundPerBinTest = [np.NINF, 9.5, 19.5, 29.5, 39.5, 49.5, 59.5, 69.5, 79.5, 89.5]\n",
+    "lowerBoundPerBinTest = [-np.inf, 9.5, 19.5, 29.5, 39.5, 49.5, 59.5, 69.5, 79.5, 89.5]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(10)])\n",
     "\n",
@@ -4376,7 +4376,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF] + list(np.arange(4.5, 99.5, 5))\n",
+    "lowerBoundPerBinTest = [-np.inf] + list(np.arange(4.5, 99.5, 5))\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(20)])\n",
     "\n",
@@ -4402,7 +4402,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF, 2.5, 5.5]\n",
+    "lowerBoundPerBinTest = [-np.inf, 2.5, 5.5]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(3)])\n",
     "\n",
@@ -4426,7 +4426,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF]\n",
+    "lowerBoundPerBinTest = [-np.inf]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(1)])\n",
     "\n",
@@ -4450,7 +4450,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF]\n",
+    "lowerBoundPerBinTest = [-np.inf]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(1)])"
    ]
diff --git a/dddex/__pycache__/__init__.cpython-38.pyc b/dddex/__pycache__/__init__.cpython-38.pyc
index b59f17a..5d7b199 100644
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diff --git a/dddex/__pycache__/_modidx.cpython-38.pyc b/dddex/__pycache__/_modidx.cpython-38.pyc
index dd9c6ad..e5674cc 100644
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diff --git a/dddex/__pycache__/baseClasses.cpython-38.pyc b/dddex/__pycache__/baseClasses.cpython-38.pyc
index 7cf24e6..c6fc716 100644
Binary files a/dddex/__pycache__/baseClasses.cpython-38.pyc and b/dddex/__pycache__/baseClasses.cpython-38.pyc differ
diff --git a/dddex/__pycache__/crossValidation.cpython-38.pyc b/dddex/__pycache__/crossValidation.cpython-38.pyc
index 46e674e..d2357e9 100644
Binary files a/dddex/__pycache__/crossValidation.cpython-38.pyc and b/dddex/__pycache__/crossValidation.cpython-38.pyc differ
diff --git a/dddex/__pycache__/levelSetKDEx_multivariate.cpython-38.pyc b/dddex/__pycache__/levelSetKDEx_multivariate.cpython-38.pyc
index 59b1ba0..2c12691 100644
Binary files a/dddex/__pycache__/levelSetKDEx_multivariate.cpython-38.pyc and b/dddex/__pycache__/levelSetKDEx_multivariate.cpython-38.pyc differ
diff --git a/dddex/__pycache__/levelSetKDEx_univariate.cpython-38.pyc b/dddex/__pycache__/levelSetKDEx_univariate.cpython-38.pyc
index 7b35cb8..8798971 100644
Binary files a/dddex/__pycache__/levelSetKDEx_univariate.cpython-38.pyc and b/dddex/__pycache__/levelSetKDEx_univariate.cpython-38.pyc differ
diff --git a/dddex/__pycache__/loadData.cpython-38.pyc b/dddex/__pycache__/loadData.cpython-38.pyc
index bc62e33..11c43ab 100644
Binary files a/dddex/__pycache__/loadData.cpython-38.pyc and b/dddex/__pycache__/loadData.cpython-38.pyc differ
diff --git a/dddex/__pycache__/utils.cpython-38.pyc b/dddex/__pycache__/utils.cpython-38.pyc
index 087df71..5709ca9 100644
Binary files a/dddex/__pycache__/utils.cpython-38.pyc and b/dddex/__pycache__/utils.cpython-38.pyc differ
diff --git a/dddex/__pycache__/wSAA.cpython-38.pyc b/dddex/__pycache__/wSAA.cpython-38.pyc
index 6b2fc05..a0af5e1 100644
Binary files a/dddex/__pycache__/wSAA.cpython-38.pyc and b/dddex/__pycache__/wSAA.cpython-38.pyc differ
diff --git a/nbs/.ipynb_checkpoints/99_unitTests-checkpoint.ipynb b/nbs/.ipynb_checkpoints/99_unitTests-checkpoint.ipynb
index 8b7d122..24ab357 100644
--- a/nbs/.ipynb_checkpoints/99_unitTests-checkpoint.ipynb
+++ b/nbs/.ipynb_checkpoints/99_unitTests-checkpoint.ipynb
@@ -4313,7 +4313,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "\n",
-    "lowerBoundPerBinTest = [np.NINF, 9.5, 19.5, 29.5, 39.5, 49.5, 59.5, 69.5, 79.5, 89.5]\n",
+    "lowerBoundPerBinTest = [-np.inf, 9.5, 19.5, 29.5, 39.5, 49.5, 59.5, 69.5, 79.5, 89.5]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(10)])\n",
     "\n",
@@ -4355,7 +4355,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF] + list(np.arange(4.5, 99.5, 5))\n",
+    "lowerBoundPerBinTest = [-np.inf] + list(np.arange(4.5, 99.5, 5))\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(20)])\n",
     "\n",
@@ -4381,7 +4381,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF, 2.5, 5.5]\n",
+    "lowerBoundPerBinTest = [-np.inf, 2.5, 5.5]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(3)])\n",
     "\n",
@@ -4405,7 +4405,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF]\n",
+    "lowerBoundPerBinTest = [-np.inf]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(1)])\n",
     "\n",
@@ -4429,7 +4429,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF]\n",
+    "lowerBoundPerBinTest = [-np.inf]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(1)])"
    ]
diff --git a/nbs/99_unitTests.ipynb b/nbs/99_unitTests.ipynb
index 4ee4589..d9e5f5c 100644
--- a/nbs/99_unitTests.ipynb
+++ b/nbs/99_unitTests.ipynb
@@ -4313,7 +4313,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "\n",
-    "lowerBoundPerBinTest = [np.NINF, 9.5, 19.5, 29.5, 39.5, 49.5, 59.5, 69.5, 79.5, 89.5]\n",
+    "lowerBoundPerBinTest = [-np.inf, 9.5, 19.5, 29.5, 39.5, 49.5, 59.5, 69.5, 79.5, 89.5]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(10)])\n",
     "\n",
@@ -4355,7 +4355,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF] + list(np.arange(4.5, 99.5, 5))\n",
+    "lowerBoundPerBinTest = [-np.inf] + list(np.arange(4.5, 99.5, 5))\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(20)])\n",
     "\n",
@@ -4381,7 +4381,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF, 2.5, 5.5]\n",
+    "lowerBoundPerBinTest = [-np.inf, 2.5, 5.5]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(3)])\n",
     "\n",
@@ -4405,7 +4405,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF]\n",
+    "lowerBoundPerBinTest = [-np.inf]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(1)])\n",
     "\n",
@@ -4429,7 +4429,7 @@
     "test_eq(len(indicesTracker), len(np.unique(indicesTracker)))\n",
     "test_eq(np.sort(indicesTracker), np.arange(len(yPred)))\n",
     "    \n",
-    "lowerBoundPerBinTest = [np.NINF]\n",
+    "lowerBoundPerBinTest = [-np.inf]\n",
     "test_eq(list(lowerBoundPerBin), lowerBoundPerBinTest)\n",
     "test_eq(list(lowerBoundPerBin.index), [i for i in range(1)])"
    ]