diff --git a/README.md b/README.md
index 042a599..cd6a2b6 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,10 @@
 - Develop an animation with an auto-generated AI voice without having to re-record and re-sync the audio.
 - Record a voiceover and have it stitched back onto the video instantly. (Note that this is not the same as AI voice cloning)
 
+Here is a demo:
+
+https://user-images.githubusercontent.com/2453968/198145393-6a1bd709-4441-4821-8541-45d5f5e25be7.mp4
+
 Currently supported TTS services:
 
 - [Azure Text to Speech](https://azure.microsoft.com/en-us/services/cognitive-services/text-to-speech/) (Recommended)
@@ -21,7 +25,7 @@ Currently supported TTS services:
 Install from PyPI with the extras `azure` and `gtts`:
 
 ```sh
-pip install manim-voiceover manim-voiceover[azure] manim-voiceover[gtts]
+pip install manim-voiceover "manim-voiceover[azure]" "manim-voiceover[gtts]"
 ```
 
 Check whether your installation works correctly:
diff --git a/manim_voiceover/services/azure.py b/manim_voiceover/services/azure.py
index fd4b6e0..506d3c3 100644
--- a/manim_voiceover/services/azure.py
+++ b/manim_voiceover/services/azure.py
@@ -9,6 +9,17 @@
 load_dotenv()
 
 
+def serialize_word_boundary(wb):
+    return {
+        "audio_offset": wb["audio_offset"],
+        "duration_milliseconds": int(wb["duration_milliseconds"].microseconds / 1000),
+        "text_offset": wb["text_offset"],
+        "word_length": wb["word_length"],
+        "text": wb["text"],
+        "boundary_type": wb["boundary_type"],
+    }
+
+
 class AzureService(SpeechService):
     def __init__(
         self,
@@ -23,7 +34,9 @@ def __init__(
         self.output_format = output_format
         SpeechService.__init__(self, **kwargs)
 
-    def generate_from_text(self, text: str, output_dir: str = None, path: str = None, **kwargs) -> dict:
+    def generate_from_text(
+        self, text: str, output_dir: str = None, path: str = None, **kwargs
+    ) -> dict:
         inner = text
         # Remove bookmarks
         inner = re.sub("<bookmark\s*mark\s*=['\"]\w*[\"']\s*/>", "", inner)
@@ -119,17 +132,17 @@ def process_event(evt):
             lambda evt: word_boundaries.append(process_event(evt))
         )
 
-        speech_synthesis_result = speech_service.speak_ssml(ssml)
+        speech_synthesis_result = speech_service.speak_ssml_async(ssml).get()
+
         json_dict = {
             "input_text": text,
             "ssml": ssml,
-            "word_boundaries": word_boundaries,
+            "word_boundaries": [serialize_word_boundary(wb) for wb in word_boundaries],
             "original_audio": audio_path,
             "json_path": json_path,
         }
 
         # open(json_path, "w").write(json.dumps(json_dict, indent=2))
-
         if (
             speech_synthesis_result.reason
             == speechsdk.ResultReason.SynthesizingAudioCompleted
diff --git a/poetry.lock b/poetry.lock
index 441e7a2..53d0d82 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -70,11 +70,11 @@ typing-extensions = {version = "*", markers = "python_version <= \"3.8\""}
 
 [[package]]
 name = "colorama"
-version = "0.4.5"
+version = "0.4.6"
 description = "Cross-platform colored terminal text."
 category = "main"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
 
 [[package]]
 name = "colour"
@@ -247,14 +247,14 @@ test = ["pytest"]
 
 [[package]]
 name = "moderngl"
-version = "5.6.4"
+version = "5.7.0"
 description = "ModernGL: High performance rendering for Python 3"
 category = "main"
 optional = false
 python-versions = "*"
 
 [package.dependencies]
-glcontext = ">=2,<3"
+glcontext = ">=2.3.6,<3"
 
 [[package]]
 name = "moderngl-window"
@@ -353,7 +353,7 @@ python-versions = "*"
 
 [[package]]
 name = "pyglet"
-version = "2.0b1"
+version = "2.0b2"
 description = "Cross-platform windowing and multimedia library"
 category = "main"
 optional = false
@@ -2440,7 +2440,7 @@ watchmedo = ["PyYAML (>=3.10)"]
 
 [[package]]
 name = "zipp"
-version = "3.9.0"
+version = "3.10.0"
 description = "Backport of pathlib-compatible object wrapper for zip files"
 category = "main"
 optional = false
@@ -2453,7 +2453,7 @@ testing = ["flake8 (<5)", "func-timeout", "jaraco.functools", "jaraco.itertools"
 [metadata]
 lock-version = "1.1"
 python-versions = ">=3.7,<3.11"
-content-hash = "a3c84853468634a9551edf4cd053b25c6b1350b4ed1c25f288a96fd17cfc6878"
+content-hash = "335b54ffcb04faba09a7f2910372482ef34b44963888f4d7e0c3626371076eb3"
 
 [metadata.files]
 azure-cognitiveservices-speech = [
@@ -2488,8 +2488,8 @@ cloup = [
     {file = "cloup-0.13.1.tar.gz", hash = "sha256:ea0acc67eed994b86e79b70d76bc2ea525b7f98f3cd8e63696896d549597ef4d"},
 ]
 colorama = [
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-    {file = "colorama-0.4.5.tar.gz", hash = "sha256:e6c6b4334fc50988a639d9b98aa429a0b57da6e17b9a44f0451f930b6967b7a4"},
+    {file = "colorama-0.4.6-py2.py3-none-any.whl", hash = "sha256:4f1d9991f5acc0ca119f9d443620b77f9d6b33703e51011c16baf57afb285fc6"},
+    {file = "colorama-0.4.6.tar.gz", hash = "sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44"},
 ]
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@@ -2656,63 +2656,44 @@ mapbox-earcut = [
     {file = "mapbox_earcut-0.12.11.tar.gz", hash = "sha256:2808757f8a95eb816d3ce225528c9cb15355afe175f3bcb6837eb7700972e0b9"},
 ]
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+    {file = "moderngl-5.7.0-pp38-pypy38_pp73-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:31e8ca1d30e604bfcd91c6c0bdc2251fe0bb398136f34fb71967062004632260"},
+    {file = "moderngl-5.7.0-pp38-pypy38_pp73-win_amd64.whl", hash = "sha256:501c98f7fde243ea3d35895c0b5aa59888c77b58c19d6a560daf2721386defe4"},
+    {file = "moderngl-5.7.0.tar.gz", hash = "sha256:3434d9e1ca268c963f744beb4ddc4747cf1f435959536cd2599e377fb62abd3f"},
 ]
 moderngl-window = [
     {file = "moderngl_window-2.4.2-py3-none-any.whl", hash = "sha256:19aca4048ca037bd9f2ca8b154ac15d07e90a05ad2d5fce32d746be8ffcc319d"},
@@ -2839,8 +2820,8 @@ pydub = [
     {file = "pydub-0.25.1.tar.gz", hash = "sha256:980a33ce9949cab2a569606b65674d748ecbca4f0796887fd6f46173a7b0d30f"},
 ]
 pyglet = [
-    {file = "pyglet-2.0b1-py3-none-any.whl", hash = "sha256:820a4ea5854043afc65c36bba5431499892d56857e1c042dba2aa21d4e9b7ba2"},
-    {file = "pyglet-2.0b1.zip", hash = "sha256:bf7add4cbecd1ce39df37983c3a7a8c015fd801734f5b3ad4cb34120eafec523"},
+    {file = "pyglet-2.0b2-py3-none-any.whl", hash = "sha256:5c5385aca126d9c97fb63c6e382abb68185921549759744ba53c22cee0e134eb"},
+    {file = "pyglet-2.0b2.zip", hash = "sha256:9607fe7f85313562738dfbf7af523db119c5b410caf76b35f8d4bd58132a32c3"},
 ]
 Pygments = [
     {file = "Pygments-2.13.0-py3-none-any.whl", hash = "sha256:f643f331ab57ba3c9d89212ee4a2dabc6e94f117cf4eefde99a0574720d14c42"},
@@ -3787,6 +3768,6 @@ watchdog = [
     {file = "watchdog-2.1.9.tar.gz", hash = "sha256:43ce20ebb36a51f21fa376f76d1d4692452b2527ccd601950d69ed36b9e21609"},
 ]
 zipp = [
-    {file = "zipp-3.9.0-py3-none-any.whl", hash = "sha256:972cfa31bc2fedd3fa838a51e9bc7e64b7fb725a8c00e7431554311f180e9980"},
-    {file = "zipp-3.9.0.tar.gz", hash = "sha256:3a7af91c3db40ec72dd9d154ae18e008c69efe8ca88dde4f9a731bb82fe2f9eb"},
+    {file = "zipp-3.10.0-py3-none-any.whl", hash = "sha256:4fcb6f278987a6605757302a6e40e896257570d11c51628968ccb2a47e80c6c1"},
+    {file = "zipp-3.10.0.tar.gz", hash = "sha256:7a7262fd930bd3e36c50b9a64897aec3fafff3dfdeec9623ae22b40e93f99bb8"},
 ]
diff --git a/pyproject.toml b/pyproject.toml
index 124719a..d44fa54 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "manim-voiceover"
-version = "0.1.0"
+version = "0.1.1"
 description = "Manim plugin for all things voiceover"
 authors = ["The Manim Community Developers <contact@manim.community>"]
 license = "MIT"
@@ -39,12 +39,13 @@ python = ">=3.7,<3.11"
 manim = "^0.16.0.post0"
 sox = "^1.4.1"
 python-dotenv = "^0.21.0"
-azure-cognitiveservices-speech = { version = "^1.24.0", extras = ["azure"] }
 mutagen = "^1.46.0"
 pydub = "^0.25.1"
-gTTS = { version = "^2.2.4", extras = ["gtts"] }
-pyttsx3 = { version = "^2.90", extras = ["pyttsx3"] }
 
+[tool.poetry.extras]
+azure = ["azure-cognitiveservices-speech==^1.24.0"]
+gtts = ["gTTS==^2.2.4"]
+pyttsx3 = ["pyttsx3==^2.90"]
 
 [tool.poetry.group.dev.dependencies]
 Pygments = "^2.13.0"