diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f3ab86d21..40b17cf4d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,7 +41,7 @@ jobs:
             java: 8
             distribution: adopt
             jobtype: 8
-          - os: windows-latest
+          - os: windows-2019
             java: 8
             distribution: adopt
             jobtype: 9
@@ -95,6 +95,9 @@ jobs:
       with:
         path: ~/.sbt
         key: ${{ runner.os }}-sbt-cache-${{ hashFiles('**/*.sbt') }}-${{ hashFiles('project/build.properties') }}
+    - name: Setup Windows C++ toolchain
+      uses: ilammy/msvc-dev-cmd@v1
+      if: ${{ matrix.os == 'windows-2019' }}
     - name: Build and test (1)
       if: ${{ matrix.jobtype == 1 }}
       shell: bash
diff --git a/launcher-package/build.sbt b/launcher-package/build.sbt
index ddfdb1f9f..aee72cdaf 100755
--- a/launcher-package/build.sbt
+++ b/launcher-package/build.sbt
@@ -119,7 +119,7 @@ val root = (project in file(".")).
       file
     },
     // update sbt.sh at root
-    sbtnVersion := "1.4.7",
+    sbtnVersion := "1.7.0-RC1",
     sbtnJarsBaseUrl := "https://github.com/sbt/sbtn-dist/releases/download",
     sbtnJarsMappings := {
       val baseUrl = sbtnJarsBaseUrl.value
diff --git a/sbt b/sbt
index c7c45a3a2..8fdadc5a1 100755
--- a/sbt
+++ b/sbt
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 set +e
-declare builtin_sbt_version="1.6.2"
+declare builtin_sbt_version="1.7.0-RC1"
 declare -a residual_args
 declare -a java_args
 declare -a scalac_args
@@ -24,7 +24,7 @@ declare build_props_sbt_version=
 declare use_sbtn=
 declare no_server=
 declare sbtn_command="$SBTN_CMD"
-declare sbtn_version="1.4.7"
+declare sbtn_version="1.7.0-RC1"
 
 ###  ------------------------------- ###
 ###  Helper methods for BASH scripts ###