diff --git a/install/docker/Dockerfile.app b/install/docker/Dockerfile.app
index 906683607d..e7ed2dfff3 100644
--- a/install/docker/Dockerfile.app
+++ b/install/docker/Dockerfile.app
@@ -249,6 +249,13 @@ FROM dotnetrun AS files_services
 ENV LD_LIBRARY_PATH=/usr/local/lib:/usr/local/lib64
 WORKDIR ${BUILD_PATH}/products/ASC.Files/service/
 
+RUN  echo "deb http://security.ubuntu.com/ubuntu focal-security main" | tee /etc/apt/sources.list && \
+     apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32 && \
+     apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 871920D1991BC93C && \
+     apt-get -y update && \
+     apt-get install -yq libssl1.1 && \
+     rm -rf /var/lib/apt/lists/*
+
 COPY --chown=onlyoffice:onlyoffice docker-entrypoint.py ./docker-entrypoint.py
 COPY --from=base --chown=onlyoffice:onlyoffice ${BUILD_PATH}/services/ASC.Files.Service/service/ .
 COPY --from=onlyoffice/ffvideo:6.0 --chown=onlyoffice:onlyoffice /usr/local /usr/local/