diff --git a/eng/docker/alpine.Dockerfile b/eng/docker/alpine.Dockerfile
index bc1547d1df85..8a32cf738cac 100644
--- a/eng/docker/alpine.Dockerfile
+++ b/eng/docker/alpine.Dockerfile
@@ -1,4 +1,4 @@
-FROM microsoft/dotnet:2.1.0-preview1-runtime-deps-alpine
+FROM mcr.microsoft.com/dotnet/runtime-deps:2.1-alpine
 ARG USER
 ARG USER_ID
 ARG GROUP_ID
diff --git a/eng/docker/bionic.Dockerfile b/eng/docker/bionic.Dockerfile
index 9fe672137af3..d1b063345c43 100644
--- a/eng/docker/bionic.Dockerfile
+++ b/eng/docker/bionic.Dockerfile
@@ -1,4 +1,4 @@
-FROM microsoft/dotnet:2.1-runtime-deps-bionic
+FROM mcr.microsoft.com/dotnet/runtime-deps:2.1-bionic
 
 ARG USER
 ARG USER_ID