diff --git a/Dockerfile b/Dockerfile
index 0e9485c..c517a3d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -33,6 +33,9 @@ RUN apk --no-cache add \
     py3-numpy \
     py3-psycopg2
 
+RUN apk --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/community add \
+    olm-dev
+
 RUN mkdir /tmp/mautrix-telegram
 RUN wget -qO- https://github.com/tulir/mautrix-telegram/archive/$VERSION.tar.gz | tar -xz --strip 1 -C /tmp/mautrix-telegram
 RUN cd /tmp/mautrix-telegram && pip3 install -r requirements.txt -r optional-requirements.txt && pip3 install .
@@ -80,6 +83,9 @@ RUN apk --no-cache add \
     py3-numpy \
     py3-psycopg2
 
+RUN apk --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/community add \
+    olm
+
 WORKDIR /var/lib/matrix-bridge
 
 RUN mkdir /var/lib/matrix-bridge/data