diff --git a/README.md b/README.md
index e769c6c..70dc6b7 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
   - [Retrieving Chat History](#retrieving-chat-history)
   - [Faster Loading](#faster-loading-avoiding-selenium)
   - [Proxies](#proxies)
-  - [Switching model version](#changing-claude-model)
+  - [Changing model version](#changing-claude-model)
 - [Troubleshooting](#troubleshooting)
 - [Donating](#donating)
 
@@ -23,7 +23,7 @@ While not officially supported by Anthropic, this library can enable interesting
 It allows for:
 
 - Creating chat sessions with Claude and getting chat IDs.
-- Sending messages to Claude containing up to 5 attachment files (txt, pdf, csv, etc...) 10 MB each.
+- Sending messages to Claude containing up to 5 attachment files (txt, pdf, csv, png, jpeg, etc...) 10 MB each, images are also supported!
 - Retrieving chat message history, accessing specific chat conversations.
 - Deleting old chats when they are no longer needed.
 - Sending requests through proxies.
@@ -39,6 +39,8 @@ and more.
 
 - Receive thoughtful responses to open-ended prompts and ideas. Claude can brainstorm ideas, expand on concepts, and have philosophical discussions.
 
+- Send images and let Claude analyze them for you.
+
 ## How to install
 
 ```shell
@@ -256,7 +258,7 @@ __________
 
 ### Changing Claude model
 
-In case you have accounts that are unable to migrate to latest model, you can override the `model_name` string parameter of `ClaudeAPIClient` constructor.
+In case you'd like to change the model used, or you do have accounts that are unable to migrate to latest model, you can override the `model_name` string parameter of `ClaudeAPIClient` constructor like so:
 
 ```py
 from claude_api.client import ClaudeAPIClient
@@ -265,10 +267,11 @@ from claude_api.session import SessionData
 session = SessionData(...)
 
 # Defaults to None (latest Claude model)
-# Can be either claude-2.0 or claude-2.1
 client = ClaudeAPIClient(session, model_name="claude-2.0")
 ```
 
+You can retrieve the `model_name` strings from the [official API docs](https://docs.anthropic.com/claude/docs/models-overview#model-comparison)
+
 ## TROUBLESHOOTING
 
 Some common errors that may arise during the usage of this API:
diff --git a/claude_api/client.py b/claude_api/client.py
index 1c4e095..a836f34 100644
--- a/claude_api/client.py
+++ b/claude_api/client.py
@@ -134,10 +134,6 @@ def __init__(
         Raises `ValueError` in case of failure
 
         """
-        if model_name is not None and model_name not in {"claude-2.0", "claude-2.1"}:
-            raise ValueError(
-                "model_name must be either None or one of 'claude-2.0' or 'claude-2.1' strings"
-            )
 
         self.model_name: str = model_name
         self.timeout: float = timeout
@@ -235,7 +231,7 @@ def __prepare_file_attachment(self, fpath: str, chat_id: str) -> dict | None:
         if content_type == "text/plain":
             return self.__prepare_text_file_attachment(fpath)
 
-        url = f"{self.__BASE_URL}/api/convert_document"
+        url = f"{self.__BASE_URL}/api/{self.__session.organization_id}/upload"
 
         headers = {
             "Host": "claude.ai",
@@ -268,7 +264,9 @@ def __prepare_file_attachment(self, fpath: str, chat_id: str) -> dict | None:
                 proxies=self.__get_proxy(),
             )
             if response.status_code == 200:
-                return response.json()
+                res = response.json()
+                if "file_uuid" in res:
+                    return res["file_uuid"]
         print(
             f"\n[{response.status_code}] Unable to prepare file attachment -> {fpath}\n"
             f"\nReason: {response.text}\n\n"
@@ -552,14 +550,8 @@ def send_message(
 
         attachments = []
         if attachment_paths:
-            attachments = [
-                a
-                for a in [
-                    self.__prepare_file_attachment(path, chat_id)
-                    for path in attachment_paths
-                ]
-                if a
-            ]
+            for path in attachment_paths:
+                attachments.append(self.__prepare_file_attachment(path, chat_id))
 
         url = (
             f"{self.__BASE_URL}/api/organizations/"
@@ -568,11 +560,20 @@ def send_message(
         )
 
         payload = {
-            "attachments": attachments,
+            "attachments": [],
             "files": [],
             "prompt": prompt,
             "timezone": self.timezone,
         }
+
+        for a in attachments:
+            if isinstance(a, dict):
+                # Text file attachment
+                payload["attachments"].append(a)
+            elif isinstance(a, str):
+                # Other files uploaded
+                payload["files"].append(a)
+
         if self.model_name is not None:
             payload["model"] = self.model_name
 
diff --git a/setup.py b/setup.py
index 4a8d4f3..199d572 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@
 
 setup(
     name="unofficial-claude-api",
-    version="0.3.1",
+    version="0.3.2",
     author="st1vms",
     author_email="stefano.maria.salvatore@gmail.com",
     description=__DESCRIPTION,