diff --git a/Dockerfile b/Dockerfile
index 3992402..5b7cdf5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ MAINTAINER zoffline <zoffline@tutanota.com>
 
 WORKDIR /usr/src/app
 
-RUN apk add --no-cache git gcc musl-dev libffi-dev openssl-dev file make
+RUN apk add --no-cache git gcc g++ musl-dev libffi-dev openssl-dev file make
 RUN pip install flask flask_sqlalchemy flask-login pyjwt gevent protobuf protobuf3_to_dict stravalib garmin-uploader cryptography
 
 RUN git clone --depth 1 https://github.com/zoffline/zwift-offline