diff --git a/cryptography/notebooks/Ciphers.ipynb b/cryptography/notebooks/Ciphers.ipynb
index 0be4376..09d4b1d 100644
--- a/cryptography/notebooks/Ciphers.ipynb
+++ b/cryptography/notebooks/Ciphers.ipynb
@@ -422,7 +422,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Now they key is a 26 character string, in this case \"etckfuswqjgnaopybxmvhzdlir\". This is difficult very to guess!. In the first exercice you'll learn how to break this code, at least, partially. Let's code the encryption/decryption algorithms"
+    "Now the key is a 26 character string, in this case \"etckfuswqjgnaopybxmvhzdlir\". This is very difficult to guess!. In the first exercice you'll learn how to break this code, at least, partially. Let's code the encryption/decryption algorithms"
    ]
   },
   {