diff --git a/docker/Dockerfile.hsm b/docker/Dockerfile.hsm
index 66d711e7..782b7431 100644
--- a/docker/Dockerfile.hsm
+++ b/docker/Dockerfile.hsm
@@ -17,6 +17,7 @@ COPY --from=builder /src/bin/step-ca /usr/local/bin/step-ca
 COPY --from=kms /usr/local/bin/step-kms-plugin /usr/local/bin/step-kms-plugin
 
 USER root
+RUN apt-get update
 RUN apt-get install -y --no-install-recommends libcap2-bin && \
     setcap CAP_NET_BIND_SERVICE=+eip /usr/local/bin/step-ca
 RUN apt-get install -y --no-install-recommends pcscd libpcsclite1