diff --git a/blinkpy/auth.py b/blinkpy/auth.py
index bb559907..38cb86f4 100644
--- a/blinkpy/auth.py
+++ b/blinkpy/auth.py
@@ -10,6 +10,7 @@
 from blinkpy.helpers import util
 from blinkpy.helpers.constants import (
     BLINK_URL,
+    APP_BUILD,
     DEFAULT_USER_AGENT,
     LOGIN_ENDPOINT,
     TIMEOUT,
@@ -64,9 +65,10 @@ def header(self):
         if self.token is None:
             return None
         return {
+            "APP-BUILD": APP_BUILD,
             "TOKEN_AUTH": self.token,
-            "user-agent": DEFAULT_USER_AGENT,
-            "content-type": "application/json",
+            "User-Agent": DEFAULT_USER_AGENT,
+            "Content-Type": "application/json",
         }
 
     def validate_login(self):
diff --git a/blinkpy/helpers/constants.py b/blinkpy/helpers/constants.py
index 6af0671a..6ffc530b 100644
--- a/blinkpy/helpers/constants.py
+++ b/blinkpy/helpers/constants.py
@@ -20,7 +20,7 @@
 """
 OTHER
 """
-
+APP_BUILD = "ANDROID_28373244"
 DEFAULT_USER_AGENT = "27.0ANDROID_28373244"
 DEVICE_ID = "Blinkpy"
 TIMESTAMP_FORMAT = "%Y-%m-%dT%H:%M:%S%z"
diff --git a/tests/test_auth.py b/tests/test_auth.py
index 31a9bda5..0d6168e9 100644
--- a/tests/test_auth.py
+++ b/tests/test_auth.py
@@ -132,9 +132,10 @@ def test_header(self):
         """Test header data."""
         self.auth.token = "bar"
         expected_header = {
+            "APP-BUILD": const.APP_BUILD,
             "TOKEN_AUTH": "bar",
-            "user-agent": const.DEFAULT_USER_AGENT,
-            "content-type": "application/json",
+            "User-Agent": const.DEFAULT_USER_AGENT,
+            "Content-Type": "application/json",
         }
         self.assertDictEqual(self.auth.header, expected_header)