diff --git a/.circleci/build_win.ps1 b/.circleci/build_win.ps1
index 730bb6319..874381bf7 100644
--- a/.circleci/build_win.ps1
+++ b/.circleci/build_win.ps1
@@ -20,7 +20,7 @@ cd build
 $boost_dir=(Resolve-Path $PSScriptRoot\..\deps\boost\lib\cmake\Boost-*)
 ..\deps\cmake\bin\cmake -G "Visual Studio 16 2019" -DBoost_DIR="$boost_dir\" -DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreaded -DCMAKE_INSTALL_PREFIX="$PSScriptRoot\..\upload" -DUSE_Z3=OFF ..
 if ( -not $? ) { throw "CMake configure failed." }
-msbuild solidity.sln /p:Configuration=Release /m:10 /v:minimal
+msbuild solidity.sln /p:Configuration=Debug /m:10 /v:minimal
 if ( -not $? ) { throw "Build failed." }
-..\deps\cmake\bin\cmake --build . -j 10 --target install --config Release
+..\deps\cmake\bin\cmake --build . -j 10 --target install --config Debug
 if ( -not $? ) { throw "Install target failed." }
diff --git a/.circleci/config.yml b/.circleci/config.yml
index bcfc99cd7..4472dbb71 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1256,7 +1256,7 @@ jobs:
           command: .circleci/build_win.ps1
       - run:
           name: "Run solc.exe to make sure build was successful."
-          command: .\build\solc\Release\solc.exe --version
+          command: .\build\solc\Debug\solc.exe --version
       - store_artifacts: *artifact_solc_windows
       - persist_to_workspace:
           root: build
diff --git a/.circleci/soltest.ps1 b/.circleci/soltest.ps1
index 6b67adb13..d3f99bb9a 100755
--- a/.circleci/soltest.ps1
+++ b/.circleci/soltest.ps1
@@ -2,11 +2,11 @@ $ErrorActionPreference = "Stop"
 
 cd "$PSScriptRoot\.."
 
-.\build\solc\Release\solc.exe --version
+.\build\solc\Debug\solc.exe --version
 if ( -not $? ) { throw "Cannot execute solc --version." }
 
 mkdir test_results
-.\build\test\Release\soltest.exe --color_output=no --show_progress=yes --logger=JUNIT,error,test_results/result.xml -- --no-smt
+.\build\test\Debug\soltest.exe --color_output=no --show_progress=yes --logger=JUNIT,error,test_results/result.xml -- --no-smt
 if ( -not $? ) { throw "Unoptimized soltest run failed." }
-.\build\test\Release\soltest.exe --color_output=no --show_progress=yes --logger=JUNIT,error,test_results/result_opt.xml -- --optimize --no-smt
+.\build\test\Debug\soltest.exe --color_output=no --show_progress=yes --logger=JUNIT,error,test_results/result_opt.xml -- --optimize --no-smt
 if ( -not $? ) { throw "Optimized soltest run failed." }
\ No newline at end of file