diff --git a/Dockerfile b/Dockerfile
index 792b1d4d..75e765ef 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ COPY ./fet2020 /app
 #RUN apk add --no-cache --virtual .build-deps \
 #    ca-certificates gcc postgresql-dev linux-headers musl-dev \
 #    libffi-dev jpeg-dev zlib-dev
-RUN apk add --no-cache --virtual jpeg-dev zlib-dev libffi-dev
+RUN apk add --no-cache --virtual .build-deps jpeg-dev zlib-dev libffi-dev
 
 RUN pip install --upgrade pip
 RUN pip install -r requirements.txt
\ No newline at end of file
diff --git a/fet2020/requirements.txt b/fet2020/requirements.txt
index 87c6ec90..0bf01482 100644
--- a/fet2020/requirements.txt
+++ b/fet2020/requirements.txt
@@ -7,4 +7,5 @@ django-static-jquery-ui==1.12.1.1
 docutils==0.16
 easy-thumbnails==2.7.0
 etherpad-lite==0.5
-django-filter
\ No newline at end of file
+django-filter
+ldap3
\ No newline at end of file