diff --git a/Dockerfile b/Dockerfile
index ec89c42e..d2cb71e2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -49,8 +49,10 @@ COPY requirements.txt /opt/mautrix-telegram/requirements.txt
 COPY optional-requirements.txt /opt/mautrix-telegram/optional-requirements.txt
 WORKDIR /opt/mautrix-telegram
 RUN apk add --virtual .build-deps python3-dev libffi-dev build-base \
+ && pip3 install /cryptg-0.3.1-cp310-cp310-linux_x86_64.whl \
  && pip3 install --no-cache-dir -r requirements.txt -r optional-requirements.txt \
- && apk del .build-deps
+ && apk del .build-deps \
+ && rm -f /cryptg-0.3.1-cp310-cp310-linux_x86_64.whl
 
 COPY . /opt/mautrix-telegram
 RUN apk add git && pip3 install --no-cache-dir .[all] && apk del git \
diff --git a/optional-requirements.txt b/optional-requirements.txt
index a52be689..a7d77caa 100644
--- a/optional-requirements.txt
+++ b/optional-requirements.txt
@@ -2,7 +2,7 @@
 # Uncommented lines after the group definition insert things into that group.
 
 #/speedups
-cryptg>=0.1,<0.3
+cryptg>=0.1,<0.4
 cchardet
 aiodns
 brotli