Update requirements_colab.txt

system/requirements/requirements_colab.txt

@@ -22,6 +22,7 @@ torchcrepe>=0.0.2
 tqdm>=4.66.*
 unidic-lite>=1.0.8
 uvicorn>=0.29.0
+pillow==10.3.0
 fastapi
 starlette
 pypinyin
@@ -41,4 +42,4 @@ python-multipart
 hangul_romanize
 word2number
 git+https://github.com/huggingface/parler-tts.git
-piper-tts; sys_platform == "linux"
+piper-tts; sys_platform == "linux"