diff --git a/build/docker/alpine.Dockerfile b/build/docker/alpine.Dockerfile
index 1f80997905..bbe9f714dc 100644
--- a/build/docker/alpine.Dockerfile
+++ b/build/docker/alpine.Dockerfile
@@ -1,4 +1,4 @@
-FROM microsoft/dotnet:2.1-runtime-deps-alpine
+FROM microsoft/dotnet:2.1.0-preview1-runtime-deps-alpine
 ARG USER
 ARG USER_ID
 ARG GROUP_ID