diff --git a/Dockerfile b/Dockerfile
index b255d87..cb8f859 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -20,8 +20,7 @@ RUN cargo build --release
 
 FROM ubuntu:focal
 WORKDIR /app
-RUN apt update -y
-RUN apt install -y libssl-dev --no-install-recommends
+RUN apt-get update -y && apt-get install -y libssl-dev=1.1.1f-1ubuntu2.20 --no-install-recommends && rm -rf /var/lib/apt/lists/*
 COPY --from=builder /usr/src/vaultwarden_ldap/target/release/vaultwarden_ldap /usr/local/bin/
 
 CMD ["/usr/local/bin/vaultwarden_ldap"]