diff --git a/moto/sns/models.py b/moto/sns/models.py
index 7d297fbdc..ea393e845 100644
--- a/moto/sns/models.py
+++ b/moto/sns/models.py
@@ -331,8 +331,11 @@ class PlatformEndpoint(BaseModel):
         # automatically ensure they exist as well.
         if "Token" not in self.attributes:
             self.attributes["Token"] = self.token
-        if "Enabled" not in self.attributes:
-            self.attributes["Enabled"] = "True"
+        if "Enabled" in self.attributes:
+            enabled = self.attributes["Enabled"]
+            self.attributes["Enabled"] = enabled.lower()
+        else:
+            self.attributes["Enabled"] = "true"
 
     @property
     def enabled(self):
@@ -594,6 +597,8 @@ class SNSBackend(BaseBackend):
 
     def set_endpoint_attributes(self, arn, attributes):
         endpoint = self.get_endpoint(arn)
+        if "Enabled" in attributes:
+            attributes["Enabled"] = attributes["Enabled"].lower()
         endpoint.attributes.update(attributes)
         return endpoint
 
diff --git a/tests/test_sns/test_application.py b/tests/test_sns/test_application.py
index 1f5526219..2b5739863 100644
--- a/tests/test_sns/test_application.py
+++ b/tests/test_sns/test_application.py
@@ -189,7 +189,7 @@ def test_get_endpoint_attributes():
         platform_application_arn=application_arn,
         token="some_unique_id",
         custom_user_data="some user data",
-        attributes={"Enabled": False, "CustomUserData": "some data"},
+        attributes={"CustomUserData": "some data"},
     )
     endpoint_arn = endpoint["CreatePlatformEndpointResponse"][
         "CreatePlatformEndpointResult"
@@ -199,7 +199,7 @@ def test_get_endpoint_attributes():
         "GetEndpointAttributesResponse"
     ]["GetEndpointAttributesResult"]["Attributes"]
     attributes.should.equal(
-        {"Token": "some_unique_id", "Enabled": "False", "CustomUserData": "some data"}
+        {"Token": "some_unique_id", "Enabled": "true", "CustomUserData": "some data"}
     )
 
 
@@ -236,7 +236,7 @@ def test_set_endpoint_attributes():
         "GetEndpointAttributesResponse"
     ]["GetEndpointAttributesResult"]["Attributes"]
     attributes.should.equal(
-        {"Token": "some_unique_id", "Enabled": "False", "CustomUserData": "other data"}
+        {"Token": "some_unique_id", "Enabled": "false", "CustomUserData": "other data"}
     )