diff --git a/CHANGES.md b/CHANGES.md
index fc533b2..f18e1ae 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 1.0.0
+
+- [BREAKING] For consistency across APIs following actions have been taken:
+  - Renamed transactional email request optional arguments ``amp_body`` to ``body_amp`` and ``plaintext_body`` to ``body_plain``
+  - Changed transactional email request default values for optional boolean arguments ``disable_css_preproceessing``, ``queue_draft``, ``disable_message_retention``, ``tracked``, ``send_to_unsubscribed``
+
 ## 0.5.1
 
 - [FIX] Change parameter name from ``id_`` to ``identifier`` of the method ``identify`` to avoid naming collision.
diff --git a/async_customerio/api.py b/async_customerio/api.py
index ab76f30..d7229a8 100644
--- a/async_customerio/api.py
+++ b/async_customerio/api.py
@@ -32,16 +32,16 @@ def __init__(
         subject: str = None,
         preheader: str = None,
         body: str = None,
-        plaintext_body: str = None,
-        amp_body: str = None,
+        body_amp: str = None,
+        body_plain: str = None,
         fake_bcc: str = None,
-        disable_message_retention: bool = None,
-        send_to_unsubscribed: bool = None,
-        tracked: bool = None,
-        queue_draft: bool = None,
+        disable_message_retention: bool = False,
+        send_to_unsubscribed: bool = True,
+        tracked: bool = True,
+        queue_draft: bool = False,
         message_data: dict = None,
         attachments: t.Dict[str, str] = None,
-        disable_css_preproceessing: bool = None,
+        disable_css_preproceessing: bool = False,
         send_at: int = None,
         language: str = None,
     ):
@@ -56,8 +56,8 @@ def __init__(
         self.subject = subject
         self.preheader = preheader
         self.body = body
-        self.plaintext_body = plaintext_body
-        self.amp_body = amp_body
+        self.body_plain = body_plain
+        self.body_amp = body_amp
         self.fake_bcc = fake_bcc
         self.disable_message_retention = disable_message_retention
         self.send_to_unsubscribed = send_to_unsubscribed
@@ -101,8 +101,8 @@ def to_dict(self):
             subject="subject",
             preheader="preheader",
             body="body",
-            plaintext_body="plaintext_body",
-            amp_body="amp_body",
+            body_amp="body_amp",
+            body_plain="body_plain",
             fake_bcc="fake_bcc",
             disable_message_retention="disable_message_retention",
             send_to_unsubscribed="send_to_unsubscribed",
diff --git a/pyproject.toml b/pyproject.toml
index e24ad52..260e989 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "async-customerio"
-version = "0.5.1"
+version = "1.0.0"
 description = "Async CustomerIO Client - a Python client to interact with CustomerIO in an async fashion."
 license = "MIT"
 authors = [