diff --git a/4-Classification/4-Applied/solution/notebook.ipynb b/4-Classification/4-Applied/solution/notebook.ipynb
index b9682048..5ed9da52 100644
--- a/4-Classification/4-Applied/solution/notebook.ipynb
+++ b/4-Classification/4-Applied/solution/notebook.ipynb
@@ -64,7 +64,7 @@
     }
    ],
    "source": [
-    "pip install skl2onnx"
+    "!pip install skl2onnx"
    ]
   },
   {
diff --git a/5-Clustering/1-Visualize/solution/notebook.ipynb b/5-Clustering/1-Visualize/solution/notebook.ipynb
index 1542549c..44c15495 100644
--- a/5-Clustering/1-Visualize/solution/notebook.ipynb
+++ b/5-Clustering/1-Visualize/solution/notebook.ipynb
@@ -61,7 +61,7 @@
     }
    ],
    "source": [
-    "pip install seaborn"
+    "!pip install seaborn"
    ]
   },
   {
diff --git a/7-TimeSeries/2-ARIMA/solution/notebook.ipynb b/7-TimeSeries/2-ARIMA/solution/notebook.ipynb
index 62ebccaa..4914ab70 100644
--- a/7-TimeSeries/2-ARIMA/solution/notebook.ipynb
+++ b/7-TimeSeries/2-ARIMA/solution/notebook.ipynb
@@ -41,7 +41,7 @@
     }
    ],
    "source": [
-    "pip install statsmodels"
+    "!pip install statsmodels"
    ]
   },
   {
@@ -354,7 +354,6 @@
     "print(results.summary())\n"
    ]
   },
-
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -741,4 +740,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 2
-}
+}
\ No newline at end of file
diff --git a/8-Reinforcement/2-Gym/solution/notebook.ipynb b/8-Reinforcement/2-Gym/solution/notebook.ipynb
index 49e1c43e..b6338c89 100644
--- a/8-Reinforcement/2-Gym/solution/notebook.ipynb
+++ b/8-Reinforcement/2-Gym/solution/notebook.ipynb
@@ -57,7 +57,7 @@
    ],
    "source": [
     "import sys\n",
-    "!{sys.executable} -m pip install gym \n",
+    "!pip install gym \n",
     "\n",
     "import gym\n",
     "import matplotlib.pyplot as plt\n",