diff --git a/samples/Saritasa.BoringWarehouse/Docker/Dockerfile.db b/samples/Saritasa.BoringWarehouse/Docker/Dockerfile.db
index 57973571..c046ce26 100644
--- a/samples/Saritasa.BoringWarehouse/Docker/Dockerfile.db
+++ b/samples/Saritasa.BoringWarehouse/Docker/Dockerfile.db
@@ -1,5 +1,5 @@
 # escape=`
-FROM microsoft/mssql-server-windows-express
+FROM microsoft/mssql-server-windows-express:2017-CU1
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';"]
 
 ENV `
diff --git a/samples/Saritasa.BoringWarehouse/Docker/Dockerfile.web b/samples/Saritasa.BoringWarehouse/Docker/Dockerfile.web
index da62b503..7d29ef27 100644
--- a/samples/Saritasa.BoringWarehouse/Docker/Dockerfile.web
+++ b/samples/Saritasa.BoringWarehouse/Docker/Dockerfile.web
@@ -1,5 +1,5 @@
 # escape=`
-FROM microsoft/aspnet
+FROM microsoft/aspnet:4.7.1-windowsservercore-1709
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';"]
 
 RUN `
diff --git a/samples/ZergRushCo.Todosya/Docker/Dockerfile.db b/samples/ZergRushCo.Todosya/Docker/Dockerfile.db
index 57973571..c046ce26 100644
--- a/samples/ZergRushCo.Todosya/Docker/Dockerfile.db
+++ b/samples/ZergRushCo.Todosya/Docker/Dockerfile.db
@@ -1,5 +1,5 @@
 # escape=`
-FROM microsoft/mssql-server-windows-express
+FROM microsoft/mssql-server-windows-express:2017-CU1
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';"]
 
 ENV `
diff --git a/samples/ZergRushCo.Todosya/Docker/Dockerfile.web b/samples/ZergRushCo.Todosya/Docker/Dockerfile.web
index cf31ee9a..5bf2e688 100644
--- a/samples/ZergRushCo.Todosya/Docker/Dockerfile.web
+++ b/samples/ZergRushCo.Todosya/Docker/Dockerfile.web
@@ -1,5 +1,5 @@
 # escape=`
-FROM microsoft/iis
+FROM microsoft/iis:windowsservercore-1709
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';"]
 
 RUN `