diff --git a/1.11/windows/windowsservercore-1903/Dockerfile b/1.11/windows/windowsservercore-1903/Dockerfile
new file mode 100644
index 00000000..1225a916
--- /dev/null
+++ b/1.11/windows/windowsservercore-1903/Dockerfile
@@ -0,0 +1,73 @@
+FROM mcr.microsoft.com/windows/servercore:1903
+
+# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
+SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
+
+# install MinGit (especially for "go get")
+# https://blogs.msdn.microsoft.com/visualstudioalm/2016/09/03/whats-new-in-git-for-windows-2-10/
+# "Essentially, it is a Git for Windows that was stripped down as much as possible without sacrificing the functionality in which 3rd-party software may be interested."
+# "It currently requires only ~45MB on disk."
+ENV GIT_VERSION 2.11.1
+ENV GIT_TAG v${GIT_VERSION}.windows.1
+ENV GIT_DOWNLOAD_URL https://github.com/git-for-windows/git/releases/download/${GIT_TAG}/MinGit-${GIT_VERSION}-64-bit.zip
+ENV GIT_DOWNLOAD_SHA256 668d16a799dd721ed126cc91bed49eb2c072ba1b25b50048280a4e2c5ed56e59
+# steps inspired by "chcolateyInstall.ps1" from "git.install" (https://chocolatey.org/packages/git.install)
+RUN Write-Host ('Downloading {0} ...' -f $env:GIT_DOWNLOAD_URL); \
+	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
+	Invoke-WebRequest -Uri $env:GIT_DOWNLOAD_URL -OutFile 'git.zip'; \
+	\
+	Write-Host ('Verifying sha256 ({0}) ...' -f $env:GIT_DOWNLOAD_SHA256); \
+	if ((Get-FileHash git.zip -Algorithm sha256).Hash -ne $env:GIT_DOWNLOAD_SHA256) { \
+		Write-Host 'FAILED!'; \
+		exit 1; \
+	}; \
+	\
+	Write-Host 'Expanding ...'; \
+	Expand-Archive -Path git.zip -DestinationPath C:\git\.; \
+	\
+	Write-Host 'Removing ...'; \
+	Remove-Item git.zip -Force; \
+	\
+	Write-Host 'Updating PATH ...'; \
+	$env:PATH = 'C:\git\cmd;C:\git\mingw64\bin;C:\git\usr\bin;' + $env:PATH; \
+	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
+	\
+	Write-Host 'Verifying install ...'; \
+	Write-Host '  git --version'; git --version; \
+	\
+	Write-Host 'Complete.';
+
+# ideally, this would be C:\go to match Linux a bit closer, but C:\go is the recommended install path for Go itself on Windows
+ENV GOPATH C:\\gopath
+
+# PATH isn't actually set in the Docker image, so we have to set it from within the container
+RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
+	Write-Host ('Updating PATH: {0}' -f $newPath); \
+	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
+# doing this first to share cache across versions more aggressively
+
+ENV GOLANG_VERSION 1.11.12
+
+RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
+	Write-Host ('Downloading {0} ...' -f $url); \
+	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
+	\
+	$sha256 = 'a86e41e06d39f68ea8fa6a7765ce529abe3ec5037ba3a3bff2e6d25455a4fa34'; \
+	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
+	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
+		Write-Host 'FAILED!'; \
+		exit 1; \
+	}; \
+	\
+	Write-Host 'Expanding ...'; \
+	Expand-Archive go.zip -DestinationPath C:\; \
+	\
+	Write-Host 'Verifying install ("go version") ...'; \
+	go version; \
+	\
+	Write-Host 'Removing ...'; \
+	Remove-Item go.zip -Force; \
+	\
+	Write-Host 'Complete.';
+
+WORKDIR $GOPATH
diff --git a/1.12/windows/windowsservercore-1903/Dockerfile b/1.12/windows/windowsservercore-1903/Dockerfile
new file mode 100644
index 00000000..aeff554b
--- /dev/null
+++ b/1.12/windows/windowsservercore-1903/Dockerfile
@@ -0,0 +1,73 @@
+FROM mcr.microsoft.com/windows/servercore:1903
+
+# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
+SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
+
+# install MinGit (especially for "go get")
+# https://blogs.msdn.microsoft.com/visualstudioalm/2016/09/03/whats-new-in-git-for-windows-2-10/
+# "Essentially, it is a Git for Windows that was stripped down as much as possible without sacrificing the functionality in which 3rd-party software may be interested."
+# "It currently requires only ~45MB on disk."
+ENV GIT_VERSION 2.11.1
+ENV GIT_TAG v${GIT_VERSION}.windows.1
+ENV GIT_DOWNLOAD_URL https://github.com/git-for-windows/git/releases/download/${GIT_TAG}/MinGit-${GIT_VERSION}-64-bit.zip
+ENV GIT_DOWNLOAD_SHA256 668d16a799dd721ed126cc91bed49eb2c072ba1b25b50048280a4e2c5ed56e59
+# steps inspired by "chcolateyInstall.ps1" from "git.install" (https://chocolatey.org/packages/git.install)
+RUN Write-Host ('Downloading {0} ...' -f $env:GIT_DOWNLOAD_URL); \
+	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
+	Invoke-WebRequest -Uri $env:GIT_DOWNLOAD_URL -OutFile 'git.zip'; \
+	\
+	Write-Host ('Verifying sha256 ({0}) ...' -f $env:GIT_DOWNLOAD_SHA256); \
+	if ((Get-FileHash git.zip -Algorithm sha256).Hash -ne $env:GIT_DOWNLOAD_SHA256) { \
+		Write-Host 'FAILED!'; \
+		exit 1; \
+	}; \
+	\
+	Write-Host 'Expanding ...'; \
+	Expand-Archive -Path git.zip -DestinationPath C:\git\.; \
+	\
+	Write-Host 'Removing ...'; \
+	Remove-Item git.zip -Force; \
+	\
+	Write-Host 'Updating PATH ...'; \
+	$env:PATH = 'C:\git\cmd;C:\git\mingw64\bin;C:\git\usr\bin;' + $env:PATH; \
+	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
+	\
+	Write-Host 'Verifying install ...'; \
+	Write-Host '  git --version'; git --version; \
+	\
+	Write-Host 'Complete.';
+
+# ideally, this would be C:\go to match Linux a bit closer, but C:\go is the recommended install path for Go itself on Windows
+ENV GOPATH C:\\gopath
+
+# PATH isn't actually set in the Docker image, so we have to set it from within the container
+RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
+	Write-Host ('Updating PATH: {0}' -f $newPath); \
+	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
+# doing this first to share cache across versions more aggressively
+
+ENV GOLANG_VERSION 1.12.7
+
+RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
+	Write-Host ('Downloading {0} ...' -f $url); \
+	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
+	\
+	$sha256 = '502712c0e29edc6b9cda6fa5e4b6ff9b36e27d225373baead8708c9634aa8e50'; \
+	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
+	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
+		Write-Host 'FAILED!'; \
+		exit 1; \
+	}; \
+	\
+	Write-Host 'Expanding ...'; \
+	Expand-Archive go.zip -DestinationPath C:\; \
+	\
+	Write-Host 'Verifying install ("go version") ...'; \
+	go version; \
+	\
+	Write-Host 'Removing ...'; \
+	Remove-Item go.zip -Force; \
+	\
+	Write-Host 'Complete.';
+
+WORKDIR $GOPATH
diff --git a/1.13-rc/windows/windowsservercore-1903/Dockerfile b/1.13-rc/windows/windowsservercore-1903/Dockerfile
new file mode 100644
index 00000000..32c7b379
--- /dev/null
+++ b/1.13-rc/windows/windowsservercore-1903/Dockerfile
@@ -0,0 +1,73 @@
+FROM mcr.microsoft.com/windows/servercore:1903
+
+# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
+SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
+
+# install MinGit (especially for "go get")
+# https://blogs.msdn.microsoft.com/visualstudioalm/2016/09/03/whats-new-in-git-for-windows-2-10/
+# "Essentially, it is a Git for Windows that was stripped down as much as possible without sacrificing the functionality in which 3rd-party software may be interested."
+# "It currently requires only ~45MB on disk."
+ENV GIT_VERSION 2.11.1
+ENV GIT_TAG v${GIT_VERSION}.windows.1
+ENV GIT_DOWNLOAD_URL https://github.com/git-for-windows/git/releases/download/${GIT_TAG}/MinGit-${GIT_VERSION}-64-bit.zip
+ENV GIT_DOWNLOAD_SHA256 668d16a799dd721ed126cc91bed49eb2c072ba1b25b50048280a4e2c5ed56e59
+# steps inspired by "chcolateyInstall.ps1" from "git.install" (https://chocolatey.org/packages/git.install)
+RUN Write-Host ('Downloading {0} ...' -f $env:GIT_DOWNLOAD_URL); \
+	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
+	Invoke-WebRequest -Uri $env:GIT_DOWNLOAD_URL -OutFile 'git.zip'; \
+	\
+	Write-Host ('Verifying sha256 ({0}) ...' -f $env:GIT_DOWNLOAD_SHA256); \
+	if ((Get-FileHash git.zip -Algorithm sha256).Hash -ne $env:GIT_DOWNLOAD_SHA256) { \
+		Write-Host 'FAILED!'; \
+		exit 1; \
+	}; \
+	\
+	Write-Host 'Expanding ...'; \
+	Expand-Archive -Path git.zip -DestinationPath C:\git\.; \
+	\
+	Write-Host 'Removing ...'; \
+	Remove-Item git.zip -Force; \
+	\
+	Write-Host 'Updating PATH ...'; \
+	$env:PATH = 'C:\git\cmd;C:\git\mingw64\bin;C:\git\usr\bin;' + $env:PATH; \
+	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
+	\
+	Write-Host 'Verifying install ...'; \
+	Write-Host '  git --version'; git --version; \
+	\
+	Write-Host 'Complete.';
+
+# ideally, this would be C:\go to match Linux a bit closer, but C:\go is the recommended install path for Go itself on Windows
+ENV GOPATH C:\\gopath
+
+# PATH isn't actually set in the Docker image, so we have to set it from within the container
+RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
+	Write-Host ('Updating PATH: {0}' -f $newPath); \
+	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
+# doing this first to share cache across versions more aggressively
+
+ENV GOLANG_VERSION 1.13beta1
+
+RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
+	Write-Host ('Downloading {0} ...' -f $url); \
+	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
+	\
+	$sha256 = '08098b4b0e1a105971d2fced2842e806f8ffa08973ae8781fd22dd90f76404fb'; \
+	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
+	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
+		Write-Host 'FAILED!'; \
+		exit 1; \
+	}; \
+	\
+	Write-Host 'Expanding ...'; \
+	Expand-Archive go.zip -DestinationPath C:\; \
+	\
+	Write-Host 'Verifying install ("go version") ...'; \
+	go version; \
+	\
+	Write-Host 'Removing ...'; \
+	Remove-Item go.zip -Force; \
+	\
+	Write-Host 'Complete.';
+
+WORKDIR $GOPATH
diff --git a/generate-stackbrew-library.sh b/generate-stackbrew-library.sh
index a4078e51..fe421bda 100755
--- a/generate-stackbrew-library.sh
+++ b/generate-stackbrew-library.sh
@@ -74,7 +74,7 @@ for version in "${versions[@]}"; do
 
 	for v in \
 		buster stretch alpine{3.10,3.9} \
-		windows/windowsservercore-{ltsc2016,1803,1809} \
+		windows/windowsservercore-{ltsc2016,1803,1809,1903} \
 		windows/nanoserver-{1803,1809} \
 	; do
 		dir="$version/$v"
diff --git a/update.sh b/update.sh
index 9697d20c..bd07bf62 100755
--- a/update.sh
+++ b/update.sh
@@ -107,7 +107,7 @@ for version in "${versions[@]}"; do
 
 	for winVariant in \
 		nanoserver-{1803,1809} \
-		windowsservercore-{ltsc2016,1803,1809} \
+		windowsservercore-{ltsc2016,1803,1809,1903} \
 	; do
 		if [ -d "$version/windows/$winVariant" ]; then
 			sed -r \