diff --git a/docker/Dockerfile.linux.amd64 b/docker/Dockerfile.linux.amd64
index c9b0d8c..c403e29 100644
--- a/docker/Dockerfile.linux.amd64
+++ b/docker/Dockerfile.linux.amd64
@@ -1,4 +1,4 @@
-FROM plugins/base:multiarch
+FROM plugins/base:multiarch@sha256:3978877ab300edf45c42dbcba7866e05449f5a1e537a9dbf48cfd354ddf15e8a
 
 LABEL maintainer="Drone.IO Community <drone-dev@googlegroups.com>" \
   org.label-schema.name="Drone Download" \
diff --git a/docker/Dockerfile.linux.arm64 b/docker/Dockerfile.linux.arm64
index 4a4b530..9fec430 100644
--- a/docker/Dockerfile.linux.arm64
+++ b/docker/Dockerfile.linux.arm64
@@ -1,4 +1,4 @@
-FROM plugins/base:multiarch
+FROM plugins/base:multiarch@sha256:3978877ab300edf45c42dbcba7866e05449f5a1e537a9dbf48cfd354ddf15e8a
 
 LABEL maintainer="Drone.IO Community <drone-dev@googlegroups.com>" \
   org.label-schema.name="Drone Download" \