diff --git a/README.md b/README.md
index d1b3b31..6430a19 100644
--- a/README.md
+++ b/README.md
@@ -17,12 +17,15 @@ $ pip3 install elicznik
 
 With the package installed readings can be retrieved by simply running the `elicznik` command:
 ```
-usage: elicznik [-h] [--format {raw,table,csv}] username password [date]
+usage: elicznik [-h] [--format {raw,table,csv}] username password [start date] [end date]
 
 positional arguments:
   username              tauron-dystrybucja.pl user name
   password              tauron-dystrybucja.pl password
-  date                  Date of data to be retrieved
+  start date            Start date of date range to be retrieved, in ISO8601 format. If the end date is omitted, it's the only date for which
+                        measurements are retrieved.
+  end date              End date of date range to be retrieved, inclusive, in ISO8601 format. Can be omitted to only retrieve a single day's
+                        measurements.
 
 optional arguments:
   -h, --help            show this help message and exit
@@ -70,7 +73,19 @@ import datetime
 import elicznik
 
 with elicznik.ELicznik("freddy@example.com", "secretpassword") as m:
-    readings = m.get_readings(datetime.date(2021, 7, 10))
+    # date range
+    print("July 2021")
+
+    readings = m.get_readings(datetime.date(2021, 7, 1), datetime.date(2021, 7, 31))
+
+    for timestamp, consumed, produced in readings:
+        print(timestamp, consumed, produced)
+
+    # single day
+    print("Yesterday")
+
+    yesterday = datetime.date.today() - datetime.timedelta(days=1)
+    readings = m.get_readings(yesterday)
 
     for timestamp, consumed, produced in readings:
         print(timestamp, consumed, produced)
@@ -81,7 +96,6 @@ with elicznik.ELicznik("freddy@example.com", "secretpassword") as m:
 
 * Add support for accounts with multiple meters
 * Convert the dates to UTC and handle switches from and to DST properly
-* Allow reading a date range instead of just one day
 * Make the dependency on tabulate optional
 
 
diff --git a/setup.py b/setup.py
index 931db2f..4d05dc5 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@ long_description = (here / 'README.md').read_text(encoding='utf-8')
 
 setup(
     name='elicznik',
-    version='1.0',
+    version='1.1',
     description='Tauron eLicznik scrapper',
     long_description=long_description,
     long_description_content_type='text/markdown',
diff --git a/src/elicznik/__main__.py b/src/elicznik/__main__.py
index 19e568f..fd10fa6 100644
--- a/src/elicznik/__main__.py
+++ b/src/elicznik/__main__.py
@@ -20,24 +20,46 @@ def main():
     parser.add_argument("username", help="tauron-dystrybucja.pl user name")
     parser.add_argument("password", help="tauron-dystrybucja.pl password")
     parser.add_argument(
-        "date",
+        "start date",
         nargs="?",
         type=datetime.date.fromisoformat,
         default=datetime.date.today() - datetime.timedelta(days=1),
-        help="Date of data to be retrieved",
+        help="Start date of date range to be retrieved, in ISO8601 format. "
+        "If the end date is omitted, it's the only date for which "
+        "measurements are retrieved.",
+    )
+    parser.add_argument(
+        "end date",
+        nargs="?",
+        type=datetime.date.fromisoformat,
+        default=None,
+        help="End date of date range to be retrieved, inclusive, "
+        "in ISO8601 format.  Can be omitted to only retrieve a single "
+        "day's measurements.",
     )
 
     args = parser.parse_args()
 
     with ELicznik(args.username, args.password) as elicznik:
         if args.format == "raw":
-            print(json.dumps(elicznik.get_raw_readings(args.date), indent=4))
+            print(
+                json.dumps(
+                    elicznik.get_raw_readings(
+                        args.start_date, args.end_date
+                    ),
+                    indent=4,
+                )
+            )
             return
 
-        result = elicznik.get_readings(args.date)
+        result = elicznik.get_readings(args.start_date, args.end_date)
 
         if args.format == "table":
-            print(tabulate.tabulate(result, headers=["timestamp", "consumed", "produced"]))
+            print(
+                tabulate.tabulate(
+                    result, headers=["timestamp", "consumed", "produced"]
+                )
+            )
         else:
             writer = csv.writer(sys.stdout)
             for timestamp, consumed, produced in result:
diff --git a/src/elicznik/elicznik.py b/src/elicznik/elicznik.py
index 22a4be5..f38171a 100755
--- a/src/elicznik/elicznik.py
+++ b/src/elicznik/elicznik.py
@@ -32,7 +32,8 @@ class ELicznik:
     def __exit__(self, exc_type, exc_val, exc_tb):
         pass
 
-    def get_raw_readings(self, date):
+    def get_raw_readings(self, start_date, end_date=None):
+        end_date = end_date or start_date
         return self.session.post(
             self.CHART_URL,
             data={
@@ -40,8 +41,8 @@ class ELicznik:
                 # "dane[chartDay]": date.strftime("%d.%m.%Y"),
                 "dane[paramType]": "csv",
                 "dane[trybCSV]": "godzin",
-                "dane[startDay]": date.strftime("%d.%m.%Y"),
-                "dane[endDay]": date.strftime("%d.%m.%Y"),
+                "dane[startDay]": start_date.strftime("%d.%m.%Y"),
+                "dane[endDay]": end_date.strftime("%d.%m.%Y"),
                 "dane[checkOZE]": "on",
             },
         ).json()
@@ -59,8 +60,8 @@ class ELicznik:
             value = element.get("EC")
             yield timestamp, value
 
-    def get_readings(self, date):
-        data = self.get_raw_readings(date).get("dane", {})
+    def get_readings(self, start_date, end_date=None):
+        data = self.get_raw_readings(start_date, end_date).get("dane", {})
         consumed = dict(self._extract_values_with_timestamps(data.get("chart", [])))
         produced = dict(self._extract_values_with_timestamps(data.get("OZE", [])))
         return sorted(