diff --git a/docker/images/build-kit/alpine.Dockerfile b/docker/images/build-kit/alpine.Dockerfile
index 1a02516..3f93ee1 100644
--- a/docker/images/build-kit/alpine.Dockerfile
+++ b/docker/images/build-kit/alpine.Dockerfile
@@ -47,7 +47,9 @@ RUN apk add --no-cache \
         # required by RiseV2G
         maven \
         # required by pybind11
-        python3-dev
+        python3-dev \
+	# required for certificate generation
+	openssl
 
 RUN python3 -m pip install \
     environs>=9.5.0 \