diff --git a/1.1 Introduction - Deep Learning and ANN.ipynb b/1.1 Introduction - Deep Learning and ANN.ipynb
index 935f350..19e169d 100644
--- a/1.1 Introduction - Deep Learning and ANN.ipynb	
+++ b/1.1 Introduction - Deep Learning and ANN.ipynb	
@@ -191,7 +191,7 @@
     }
    },
    "source": [
-    "<img src =\"imgs/Perceptron.png\" width=\"45%\">"
+    "<img src=\"imgs/Perceptron.png\" width=\"45%\">"
    ]
   },
   {
@@ -233,7 +233,7 @@
     "editable": true
    },
    "source": [
-    "<img src =\"imgs/MLP.png\" width=\"45%\">"
+    "<img src=\"imgs/MLP.png\" width=\"45%\">"
    ]
   },
   {
@@ -256,7 +256,7 @@
     "editable": true
    },
    "source": [
-    "<img src =\"imgs/single_layer.png\" width=\"65%\" />\n",
+    "<img src=\"imgs/single_layer.png\" width=\"65%\" />\n",
     "\n",
     "_(Source: Python Machine Learning, S. Raschka)_"
    ]
@@ -421,7 +421,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<img src =\"imgs/multi-layers-1.png\" width=\"50%\" />\n",
+    "<img src=\"imgs/multi-layers-1.png\" width=\"50%\" />\n",
     "\n",
     "_(Source: Python Machine Learning, S. Raschka)_"
    ]
@@ -488,7 +488,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<img src =\"imgs/multi-layers-2.png\" width=\"50%\" />\n",
+    "<img src=\"imgs/multi-layers-2.png\" width=\"50%\" />\n",
     "\n",
     "_(Source: Python Machine Learning, S. Raschka)_"
    ]
@@ -522,7 +522,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<img src =\"imgs/logistic_function.png\" width=\"50%\" />\n",
+    "<img src=\"imgs/logistic_function.png\" width=\"50%\" />\n",
     "\n",
     "_(Source: Python Machine Learning, S. Raschka)_"
    ]
@@ -531,7 +531,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<img src =\"imgs/fwd_step.png\" width=\"50%\" />\n",
+    "<img src=\"imgs/fwd_step.png\" width=\"50%\" />\n",
     "\n",
     "_(Source: Python Machine Learning, S. Raschka)_"
    ]
@@ -540,7 +540,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<img src =\"imgs/fwd_step_net.png\" width=\"50%\" />\n",
+    "<img src=\"imgs/fwd_step_net.png\" width=\"50%\" />\n",
     "\n",
     "_(Source: Python Machine Learning, S. Raschka)_"
    ]
@@ -573,7 +573,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<img src =\"imgs/bkwd_step_net.png\" width=\"50%\" />\n",
+    "<img src=\"imgs/bkwd_step_net.png\" width=\"50%\" />\n",
     "\n",
     "_(Source: Python Machine Learning, S. Raschka)_"
    ]
@@ -598,7 +598,7 @@
     "editable": true
    },
    "source": [
-    "<img src =\"imgs/backprop.png\" width=\"50%\">"
+    "<img src=\"imgs/backprop.png\" width=\"50%\">"
    ]
   },
   {
diff --git a/1.3 Introduction - Keras.ipynb b/1.3 Introduction - Keras.ipynb
index 670d401..973ab2f 100644
--- a/1.3 Introduction - Keras.ipynb	
+++ b/1.3 Introduction - Keras.ipynb	
@@ -444,7 +444,7 @@
    },
    "source": [
     "\n",
-    "<img src =\"imgs/overfitting.png\">"
+    "<img src=\"imgs/overfitting.png\">"
    ]
   },
   {
diff --git a/2.1 Convolutional Neural Networks.ipynb b/2.1 Convolutional Neural Networks.ipynb
index f57b61f..bc08ba0 100644
--- a/2.1 Convolutional Neural Networks.ipynb	
+++ b/2.1 Convolutional Neural Networks.ipynb	
@@ -267,7 +267,7 @@
    },
    "source": [
     "\n",
-    "<img src =\"imgs/conv.png\" width=\"50%\">"
+    "<img src=\"imgs/conv.png\" width=\"50%\">"
    ]
   },
   {
diff --git a/3.1 AutoEncoders and Embeddings.ipynb b/3.1 AutoEncoders and Embeddings.ipynb
index 9071d84..a14b895 100644
--- a/3.1 AutoEncoders and Embeddings.ipynb	
+++ b/3.1 AutoEncoders and Embeddings.ipynb	
@@ -29,7 +29,7 @@
     "collapsed": false
    },
    "source": [
-    "<img src =\"imgs/autoencoder.png\" width=\"25%\">"
+    "<img src=\"imgs/autoencoder.png\" width=\"25%\">"
    ]
   },
   {
diff --git a/3.2 RNN and LSTM.ipynb b/3.2 RNN and LSTM.ipynb
index 19db735..e01ec9e 100644
--- a/3.2 RNN and LSTM.ipynb	
+++ b/3.2 RNN and LSTM.ipynb	
@@ -21,7 +21,7 @@
     "collapsed": false
    },
    "source": [
-    "<img src =\"imgs/rnn.png\" width=\"20%\">"
+    "<img src=\"imgs/rnn.png\" width=\"20%\">"
    ]
   },
   {
@@ -123,7 +123,7 @@
     "scrolled": true
    },
    "source": [
-    "<img src =\"imgs/rnn2.png\" width=\"45%\">"
+    "<img src=\"imgs/rnn2.png\" width=\"45%\">"
    ]
   },
   {
@@ -354,7 +354,7 @@
     "scrolled": true
    },
    "source": [
-    "<img src =\"imgs/gru.png\" width=\"60%\">"
+    "<img src=\"imgs/gru.png\" width=\"60%\">"
    ]
   },
   {