diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 610bf59c1..d3bc20d3a 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -10,7 +10,7 @@ on:
     - cron: "0 0 * * *"
 
 env:
-  DOTNET_VERSION: '8.0'
+  DOTNET_VERSION: '6.0.113'
 
 # FIXME: figure out why we need to clean after make if we
 # want 'make strict' target to really happen without
@@ -18,14 +18,14 @@ env:
 # (msbuild bug?)
 
 jobs:
-  macOS--dotnet-and-mono:
+  macOS--dotnet6-and-mono:
     runs-on: macOS-13
     steps:
     - uses: actions/checkout@v1
       with:
         submodules: false
-    - name: Setup .NET SDK
-      uses: actions/setup-dotnet@v5
+    - name: Setup .NET SDK 6.0.x
+      uses: actions/setup-dotnet@v1.7.2
       with:
         dotnet-version: ${{ env.DOTNET_VERSION }}
     - name: Install specific Xamarin.iOS and Xamarin.Android versions
@@ -60,9 +60,6 @@ jobs:
         # we need to install specific version because of this bug: https://github.com/dotnet/sdk/issues/24037
         dotnet tool install fsxc --version 0.5.9.1
 
-        # fsxc was built with .NET6.x
-        export DOTNET_ROLL_FORWARD=major
-
         find . -type f -name "*.fsx" | xargs -t -I {} dotnet fsxc {}
 
   macOS--mono-only:
@@ -99,16 +96,16 @@ jobs:
     - name: integration tests
       run: make update-servers
 
-  macOS--dotnet-only:
+  macOS--dotnet6-only:
     runs-on: macOS-13
     steps:
     - uses: actions/checkout@v1
       with:
         submodules: false
-    - name: Setup .NET SDK
-      uses: actions/setup-dotnet@v5
+    - name: Setup .NET SDK 6.0.x
+      uses: actions/setup-dotnet@v1.7.2
       with:
-        dotnet-version: ${{ env.DOTNET_VERSION }}        
+        dotnet-version: ${{ env.DOTNET_VERSION }}
     - name: HACK to emulate mono uninstall
       run: sudo rm -f `which mono` && sudo rm -f `which msbuild`
     - name: configure
@@ -126,14 +123,14 @@ jobs:
     - name: integration tests
       run: make update-servers
 
-  windows--dotnet-and-legacyFramework:
+  windows--dotnet6-and-legacyFramework:
     runs-on: windows-latest
     steps:
     - uses: actions/checkout@v1
       with:
         submodules: false
-    - name: Setup .NET SDK
-      uses: actions/setup-dotnet@v5
+    - name: Setup .NET SDK 6.0.x
+      uses: actions/setup-dotnet@v1.7.2
       with:
         dotnet-version: ${{ env.DOTNET_VERSION }}
     - name: configure
@@ -158,9 +155,6 @@ jobs:
         # we need to install specific version because of this bug: https://github.com/dotnet/sdk/issues/24037
         dotnet tool install fsxc --version 0.5.9.1
 
-        # fsxc was built with .NET6.x
-        export DOTNET_ROLL_FORWARD=major
-
         find . -type f -name "*.fsx" | xargs -t -I {} dotnet fsxc {}
 
   windows--legacyFramework-only:
@@ -186,14 +180,14 @@ jobs:
     - name: integration tests
       run: .\make update-servers
 
-  windows--dotnet-only:
+  windows--dotnet6-only:
     runs-on: windows-latest
     steps:
     - uses: actions/checkout@v1
       with:
         submodules: false
-    - name: Setup .NET SDK
-      uses: actions/setup-dotnet@v5
+    - name: Setup .NET SDK 6.0.x
+      uses: actions/setup-dotnet@v1.7.2
       with:
         dotnet-version: ${{ env.DOTNET_VERSION }}
     - name: HACK to emulate legacy .NETFramework uninstall
@@ -220,9 +214,6 @@ jobs:
         # we need to install specific version because of this bug: https://github.com/dotnet/sdk/issues/24037
         dotnet tool install fsxc --version 0.5.9.1
 
-        # fsxc was built with .NET6.x
-        export DOTNET_ROLL_FORWARD=major
-
         find . -type f -name "*.fsx" | xargs -t -I {} dotnet fsxc {}
 
   linux24-github--dotnet-and-mono:
@@ -231,6 +222,10 @@ jobs:
     - uses: actions/checkout@v1
       with:
         submodules: false
+    - name: Setup .NET SDK 6.0.x
+      uses: actions/setup-dotnet@v1.7.2
+      with:
+        dotnet-version: ${{ env.DOTNET_VERSION }}
     - name: install missing dependencies
       run: sudo DEBIAN_FRONTEND=noninteractive apt install --yes fsharp nunit-console
     - name: check runtime version(s)
@@ -256,6 +251,10 @@ jobs:
     - uses: actions/checkout@v1
       with:
         submodules: false
+    - name: Setup .NET SDK 6.0.x
+      uses: actions/setup-dotnet@v1.7.2
+      with:
+        dotnet-version: ${{ env.DOTNET_VERSION }}
     - name: install missing dependencies
       run: sudo DEBIAN_FRONTEND=noninteractive apt install --yes fsharp nunit-console
     - name: install last version of mono (Microsoft APT repositories)
@@ -313,10 +312,10 @@ jobs:
     - name: integration tests
       run: make update-servers
 
-  linux24-vanilla--stockdotnet-only:
-    runs-on: ubuntu-24.04
+  linux22-vanilla--stockdotnet6-only:
+    runs-on: ubuntu-22.04
     container:
-      image: "ubuntu:24.04"
+      image: "ubuntu:22.04"
     steps:
     - uses: actions/checkout@v1
     # can't use the option below because of error "Input 'submodules' not supported when falling back to download using the GitHub REST API. To create a local Git repository instead, add Git 2.18 or higher to the PATH."
@@ -326,7 +325,7 @@ jobs:
     - name: install sudo
       run: apt update && apt install --yes sudo
     - name: install all dependencies
-      run: sudo DEBIAN_FRONTEND=noninteractive apt install --yes git make curl dotnet8
+      run: sudo DEBIAN_FRONTEND=noninteractive apt install --yes git make curl dotnet6
 
     # workaround for https://github.com/actions/runner/issues/2033
     - name: ownership workaround
@@ -353,15 +352,12 @@ jobs:
         # we need to install specific version because of this bug: https://github.com/dotnet/sdk/issues/24037
         dotnet tool install fsxc --version 0.5.9.1
 
-        # fsxc was built with .NET6.x
-        export DOTNET_ROLL_FORWARD=major
-
         find . -type f -name "*.fsx" | xargs -t -I {} dotnet fsxc {}
 
-  linux24-vanilla--stockdotnet-and-newmono:
-    runs-on: ubuntu-24.04
+  linux22-vanilla--stockdotnet6-and-newmono:
+    runs-on: ubuntu-22.04
     container:
-      image: "ubuntu:24.04"
+      image: "ubuntu:22.04"
     steps:
     - uses: actions/checkout@v1
     # can't use the option below because of error "Input 'submodules' not supported when falling back to download using the GitHub REST API. To create a local Git repository instead, add Git 2.18 or higher to the PATH."
@@ -371,7 +367,7 @@ jobs:
     - name: install sudo
       run: apt update && apt install --yes sudo
     - name: install all dependencies
-      run: sudo DEBIAN_FRONTEND=noninteractive apt install --yes git make curl dotnet8
+      run: sudo DEBIAN_FRONTEND=noninteractive apt install --yes git make curl dotnet6
     - name: install last version of mono (Microsoft APT repositories)
       run: sudo ./scripts/install_mono_from_microsoft_deb_packages.sh
 
@@ -400,15 +396,12 @@ jobs:
         # we need to install specific version because of this bug: https://github.com/dotnet/sdk/issues/24037
         dotnet tool install fsxc --version 0.5.9.1
 
-        # fsxc was built with .NET6.x
-        export DOTNET_ROLL_FORWARD=major
-
         find . -type f -name "*.fsx" | xargs -t -I {} dotnet fsxc {}
 
-  linux24-vanilla--stockdotnet-and-stockmono:
-    runs-on: ubuntu-24.04
+  linux22-vanilla--stockdotnet6-and-stockmono:
+    runs-on: ubuntu-22.04
     container:
-      image: "ubuntu:24.04"
+      image: "ubuntu:22.04"
     steps:
     - uses: actions/checkout@v1
     # can't use the option below because of error "Input 'submodules' not supported when falling back to download using the GitHub REST API. To create a local Git repository instead, add Git 2.18 or higher to the PATH."
@@ -418,7 +411,7 @@ jobs:
     - name: install sudo
       run: apt update && apt install --yes sudo
     - name: install all dependencies
-      run: sudo DEBIAN_FRONTEND=noninteractive apt install --yes git make curl dotnet8 mono-xbuild
+      run: sudo DEBIAN_FRONTEND=noninteractive apt install --yes git make curl dotnet6 mono-xbuild
 
     # workaround for https://github.com/actions/runner/issues/2033
     - name: ownership workaround
@@ -445,9 +438,6 @@ jobs:
         # we need to install specific version because of this bug: https://github.com/dotnet/sdk/issues/24037
         dotnet tool install fsxc --version 0.5.9.1
 
-        # fsxc was built with .NET6.x
-        export DOTNET_ROLL_FORWARD=major
-
         find . -type f -name "*.fsx" | xargs -t -I {} dotnet fsxc {}
 
   linux24-vanilla--newmono-only:
@@ -495,6 +485,10 @@ jobs:
     - uses: actions/checkout@v1
       with:
         submodules: false
+    - name: Setup .NET SDK 6.0.x
+      uses: actions/setup-dotnet@v1.7.2
+      with:
+        dotnet-version: ${{ env.DOTNET_VERSION }}
     - name: install missing dependencies
       run: sudo DEBIAN_FRONTEND=noninteractive apt install --yes fsharp nunit-console
     - name: check runtime version(s)
@@ -518,6 +512,10 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v1
+    - name: Setup .NET SDK 6.0.x
+      uses: actions/setup-dotnet@v1.7.2
+      with:
+        dotnet-version: ${{ env.DOTNET_VERSION }}
     - name: install missing dependencies
       run: sudo DEBIAN_FRONTEND=noninteractive apt install --yes fsharp nunit-console
     - name: install last version of mono (Microsoft APT repositories)
@@ -622,19 +620,19 @@ jobs:
     - linux24-github--dotnet-and-newmono
     - linux24-vanilla--stockmono-only
     - linux24-vanilla--newmono-only
-    - linux24-vanilla--stockdotnet-only
-    - linux24-vanilla--stockdotnet-and-stockmono
-    - linux24-vanilla--stockdotnet-and-newmono
+    - linux22-vanilla--stockdotnet6-only
+    - linux22-vanilla--stockdotnet6-and-stockmono
+    - linux22-vanilla--stockdotnet6-and-newmono
     - linux22-github--dotnet-and-mono
     - linux22-github--dotnet-and-newmono
     - linux22-vanilla--stockmono-only
     - linux22-vanilla--newmono-only
-    - windows--dotnet-and-legacyFramework
+    - windows--dotnet6-and-legacyFramework
     - windows--legacyFramework-only
-    - windows--dotnet-only
-    - macOS--dotnet-and-mono
+    - windows--dotnet6-only
+    - macOS--dotnet6-and-mono
     - macOS--mono-only
-    - macOS--dotnet-only
+    - macOS--dotnet6-only
 
     steps:
     - uses: actions/checkout@v1
diff --git a/Directory.Build.props b/Directory.Build.props
index ccd7c51ef..ba5122e77 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -8,4 +8,7 @@
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <MSBuildTreatWarningsAsErrors>true</MSBuildTreatWarningsAsErrors>
   </PropertyGroup>
+  <PropertyGroup>
+    <WarningsNotAsErrors>NETSDK1138</WarningsNotAsErrors>
+  </PropertyGroup>
 </Project>
diff --git a/scripts/make.fsx b/scripts/make.fsx
index 97c7264f2..2c5a866f8 100755
--- a/scripts/make.fsx
+++ b/scripts/make.fsx
@@ -34,9 +34,6 @@ let UNIX_NAME = "gwallet"
 let DEFAULT_FRONTEND = "GWallet.Frontend.Console"
 let BACKEND = "GWallet.Backend"
 
-// format: X.Y (can't be X.Y.Z here
-let DOTNET_VERSION = "8.0"
-
 type BinaryConfig =
     | Debug
     | Release
@@ -273,8 +270,7 @@ let GetPathToFrontendBinariesDir (binaryConfig: BinaryConfig) =
 #if LEGACY_FRAMEWORK
     Path.Combine (FsxHelper.RootDir.FullName, "src", DEFAULT_FRONTEND, "bin", binaryConfig.ToString())
 #else
-    Path.Combine (FsxHelper.RootDir.FullName, "src", DEFAULT_FRONTEND, "bin", binaryConfig.ToString(), 
-                  sprintf "net%s" DOTNET_VERSION)
+    Path.Combine (FsxHelper.RootDir.FullName, "src", DEFAULT_FRONTEND, "bin", binaryConfig.ToString(), "net6.0")
 #endif
 
 let GetPathToBackend () =
diff --git a/src/GWallet.Frontend.Console/GWallet.Frontend.Console.fsproj b/src/GWallet.Frontend.Console/GWallet.Frontend.Console.fsproj
index bc2a4f134..85569c9e0 100644
--- a/src/GWallet.Frontend.Console/GWallet.Frontend.Console.fsproj
+++ b/src/GWallet.Frontend.Console/GWallet.Frontend.Console.fsproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="..\GWallet.Backend\Properties\CommonAssemblyInfo.fs">