diff --git a/Dockerfile b/Dockerfile
index 4f3870f..9452b5f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,6 +5,7 @@ ENV VERSION=v0.1.2
 RUN apk --no-cache add \
     git \
     gcc \
+    olm-dev \
     musl-dev
 
 WORKDIR /build
@@ -22,7 +23,11 @@ RUN adduser -h /var/lib/matrix-bridge -u 2222 -D -G matrix-bridge matrix-bridge
 
 COPY --from=builder /build/bin/mautrix-whatsapp /bin/mautrix-whatsapp
 
-RUN apk --no-cache add ca-certificates
+RUN apk --no-cache add \
+    ca-certificates
+
+RUN apk --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/main add \
+    olm
 
 WORKDIR /var/lib/matrix-bridge