diff --git a/14-Strings-and-Regular-Expressions.ipynb b/14-Strings-and-Regular-Expressions.ipynb
index ca39b64..0585165 100644
--- a/14-Strings-and-Regular-Expressions.ipynb
+++ b/14-Strings-and-Regular-Expressions.ipynb
@@ -1863,7 +1863,7 @@
     }
    ],
    "source": [
-    "email2 = re.compile(r'[\\w.]+@\\w+\\.[a-z]{3}')\n",
+    "email2 = re.compile(r'[\\w\\.]+@\\w+\\.[a-z]{3}')\n",
     "email2.findall('barack.obama@whitehouse.gov')"
    ]
   },
@@ -1871,7 +1871,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "We have changed ``\"\\w+\"`` to ``\"[\\w.]+\"``, so we will match any alphanumeric character *or* a period.\n",
+    "We have changed ``\"\\w+\"`` to ``\"[\\w\\.]+\"``, so we will match any alphanumeric character *or* a period.\n",
     "With this more flexible expression, we can match a wider range of email addresses (though still not all – can you identify other shortcomings of this expression?)."
    ]
   },
@@ -1892,7 +1892,7 @@
    },
    "outputs": [],
    "source": [
-    "email3 = re.compile(r'([\\w.]+)@(\\w+)\\.([a-z]{3})')"
+    "email3 = re.compile(r'([\\w\\.]+)@(\\w+)\\.([a-z]{3})')"
    ]
   },
   {
@@ -1946,7 +1946,7 @@
     }
    ],
    "source": [
-    "email4 = re.compile(r'(?P<user>[\\w.]+)@(?P<domain>\\w+)\\.(?P<suffix>[a-z]{3})')\n",
+    "email4 = re.compile(r'(?P<user>[\\w\\.]+)@(?P<domain>\\w+)\\.(?P<suffix>[a-z]{3})')\n",
     "match = email4.match('guido@python.org')\n",
     "match.groupdict()"
    ]