diff --git a/README.md b/README.md
index 58b8f6c..5a30f23 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Type-safe JSON (de)serialization for Python. Compatible with mypy type hints.
 * Support for types out of the box:
   * Primitive types:
       * `str`, `int`, `float`, `bool`, `Decimal`, `None`
-      * `date` as `"%Y-%m-%d"`, `datetime` as `"%Y-%m-%dT%H:%M:%S%z"`, `time` as `"%H:%M:%S"`
+      * `date` as `"%Y-%m-%d"`, `datetime` as `"%Y-%m-%dT%H:%M:%S%z"` or `"%Y-%m-%dT%H:%M:%S.%f%z"`, `time` as `"%H:%M:%S"`
       * `UUID` as `str` in format `"8-4-4-4-12"`
       * `char` type as `str` of length 1
   * `Union[]` and therefore `Optional[]`
diff --git a/tests/test_json.py b/tests/test_json.py
index db0e2ae..fd162b2 100644
--- a/tests/test_json.py
+++ b/tests/test_json.py
@@ -78,6 +78,9 @@ def test_date():
 
 def test_datetime():
     check_success(datetime, datetime(year=2020, month=1, day=1, hour=17, minute=45, second=55, tzinfo=timezone.utc), '"2020-01-01T17:45:55+00:00"')
+    check_success(datetime, datetime(year=2022, month=7, day=12, hour=14, minute=43, second=53, microsecond=123456, tzinfo=timezone.utc), '"2022-07-12T14:43:53.123456+00:00"')
+    with raises(JsonError):
+        loads(datetime, '"2022-07-12"', case=snakecase)
 
 
 def test_time():
diff --git a/typ/encoding.py b/typ/encoding.py
index 48f9c51..ad3242c 100644
--- a/typ/encoding.py
+++ b/typ/encoding.py
@@ -107,8 +107,13 @@ def decode_datetime(decoder, typ, json_value):
     if typ != datetime:
         return Unsupported
     check_type(str, json_value)
-    parsed = datetime.strptime(json_value, "%Y-%m-%dT%H:%M:%S%z")
-    return parsed
+    for fmt in ["%Y-%m-%dT%H:%M:%S%z", "%Y-%m-%dT%H:%M:%S.%f%z"]:
+        try:
+            parsed = datetime.strptime(json_value, fmt)
+            return parsed
+        except:
+            pass
+    raise JsonError(f"no suitable datetime format found for {json_value}")
 
 
 def encode_time(encoder, typ, value):