diff --git a/BTCPayServer.Tests/Dockerfile b/BTCPayServer.Tests/Dockerfile
index 75b7a952f..bd996c991 100644
--- a/BTCPayServer.Tests/Dockerfile
+++ b/BTCPayServer.Tests/Dockerfile
@@ -1,4 +1,4 @@
-FROM microsoft/dotnet:2.0.0-sdk
+FROM microsoft/dotnet:2.0.5-sdk-2.1.4
 WORKDIR /app
  # caches restore result by copying csproj file separately
 COPY BTCPayServer.Tests/BTCPayServer.Tests.csproj BTCPayServer.Tests/BTCPayServer.Tests.csproj
diff --git a/global.json b/global.json
deleted file mode 100644
index 2f81d8ea5..000000000
--- a/global.json
+++ /dev/null
@@ -1 +0,0 @@
-{ "sdk": { "version": "2.0.0" } }
\ No newline at end of file