diff --git a/aleph_alpha_client/__init__.py b/aleph_alpha_client/__init__.py
index b0654e4..665a901 100644
--- a/aleph_alpha_client/__init__.py
+++ b/aleph_alpha_client/__init__.py
@@ -77,6 +77,8 @@
     "ImageControl",
     "ImagePromptItemExplanation",
     "ImageScore",
+    "load_base64_from_file",
+    "load_base64_from_url",
     "POOLING_OPTIONS",
     "Prompt",
     "PromptTemplate",
@@ -102,4 +104,5 @@
     "TokenPromptItemExplanation",
     "Tokens",
     "TokenScore",
+    "__version__",
 ]
diff --git a/aleph_alpha_client/aleph_alpha_client.py b/aleph_alpha_client/aleph_alpha_client.py
index ce50cb5..a039e9b 100644
--- a/aleph_alpha_client/aleph_alpha_client.py
+++ b/aleph_alpha_client/aleph_alpha_client.py
@@ -10,10 +10,8 @@
     Optional,
     Dict,
     Sequence,
-    Tuple,
     Type,
     Union,
-    Iterator,
 )
 import aiohttp
 import asyncio
@@ -29,8 +27,6 @@
 from aleph_alpha_client.explanation import (
     ExplanationRequest,
     ExplanationResponse,
-    ExplanationRequest,
-    ExplanationResponse,
 )
 from aleph_alpha_client.summarization import SummarizationRequest, SummarizationResponse
 from aleph_alpha_client.qa import QaRequest, QaResponse
diff --git a/aleph_alpha_client/detokenization.py b/aleph_alpha_client/detokenization.py
index 52bd974..c80b3b5 100644
--- a/aleph_alpha_client/detokenization.py
+++ b/aleph_alpha_client/detokenization.py
@@ -1,5 +1,5 @@
 from dataclasses import dataclass, asdict
-from typing import Any, Dict, List, Mapping, Optional, Sequence
+from typing import Any, Dict, Mapping, Sequence
 
 
 @dataclass(frozen=True)
diff --git a/aleph_alpha_client/explanation.py b/aleph_alpha_client/explanation.py
index f7ae023..ed29f40 100644
--- a/aleph_alpha_client/explanation.py
+++ b/aleph_alpha_client/explanation.py
@@ -9,9 +9,6 @@
     Union,
 )
 
-# Import Literal with Python 3.7 fallback
-from typing_extensions import Literal
-
 from aleph_alpha_client import Text
 
 from aleph_alpha_client.prompt import ControlTokenOverlap, Image, Prompt, PromptItem
diff --git a/aleph_alpha_client/prompt_template.py b/aleph_alpha_client/prompt_template.py
index 0f9e845..dcab716 100644
--- a/aleph_alpha_client/prompt_template.py
+++ b/aleph_alpha_client/prompt_template.py
@@ -1,6 +1,5 @@
 from re import finditer
-import re
-from typing import Dict, Iterable, Mapping, NewType, Sequence, Tuple, Union
+from typing import Dict, Iterable, Mapping, NewType, Tuple, Union
 from uuid import UUID, uuid4
 from liquid import Template
 
diff --git a/aleph_alpha_client/qa.py b/aleph_alpha_client/qa.py
index d8e8891..f51a386 100644
--- a/aleph_alpha_client/qa.py
+++ b/aleph_alpha_client/qa.py
@@ -1,5 +1,5 @@
 from dataclasses import asdict, dataclass
-from typing import Any, Dict, Mapping, Optional, Sequence
+from typing import Any, Mapping, Optional, Sequence
 
 from aleph_alpha_client.document import Document
 
diff --git a/aleph_alpha_client/summarization.py b/aleph_alpha_client/summarization.py
index 84809dc..e958b29 100644
--- a/aleph_alpha_client/summarization.py
+++ b/aleph_alpha_client/summarization.py
@@ -1,5 +1,5 @@
 from dataclasses import asdict, dataclass
-from typing import Any, Dict, Mapping, Sequence
+from typing import Any, Mapping
 
 from aleph_alpha_client.document import Document