diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 58fb98cac..8ace1bd33 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -37,7 +37,7 @@ jobs:
       - name: Build
         shell: pwsh
         run: |
-          msbuild /target:restore,build "/p:Configuration=$($env:CONFIGURATION)" /verbosity:minimal
+          msbuild /target:restore,build "/p:Configuration=$($env:CONFIGURATION)" /p:DebugType=None /verbosity:minimal
 
       - name: Upload build result
         uses: actions/upload-artifact@v3
@@ -171,7 +171,6 @@ jobs:
           $destPath = 'OpenTween.zip'
           $headCommit = '${{ github.event.pull_request.head.sha }}'
           .\tools\build-zip-archive.ps1 -BinDir $binDir -DestPath $destPath -HeadCommit $headCommit
-          Copy-Item ($binDir + 'OpenTween.pdb') -Destination '.\'
 
       - name: Upload build result
         uses: actions/upload-artifact@v3
@@ -179,4 +178,3 @@ jobs:
           name: package
           path: |
             ./OpenTween.zip
-            ./OpenTween.pdb
diff --git a/appveyor.yml b/appveyor.yml
index 167eb0c39..5986621db 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -36,8 +36,6 @@ for:
     artifacts:
       - name: OpenTween.zip
         path: OpenTween_dev-$(APPVEYOR_BUILD_NUMBER).zip
-      - name: OpenTween.pdb
-        path: OpenTween.pdb
   - # for release build
     matrix:
       only:
@@ -46,8 +44,6 @@ for:
     artifacts:
       - name: OpenTween.zip
         path: $(APPVEYOR_REPO_TAG_NAME).zip
-      - name: OpenTween.pdb
-        path: OpenTween.pdb
 
 build:
   project: OpenTween.sln
@@ -91,6 +87,5 @@ after_test:
         $headCommit = 'HEAD'
       }
       .\tools\build-zip-archive.ps1 -BinDir $binDir -DestPath $destPath -HeadCommit $headCommit
-      Copy-Item ($binDir + 'OpenTween.pdb') -Destination '.\'
 
 # vim: et fenc=utf-8 sts=2 sw=2 ts=2
diff --git a/msbuild.rsp b/msbuild.rsp
index c4dbaecb1..7f712b3d1 100644
--- a/msbuild.rsp
+++ b/msbuild.rsp
@@ -1,3 +1,3 @@
 # MSBuild response file for AppVeyor build
 
-/warnaserror
+/warnaserror /p:DebugType=None
diff --git a/tools/build-zip-archive.ps1 b/tools/build-zip-archive.ps1
index 3fd8f5989..60e37dd18 100644
--- a/tools/build-zip-archive.ps1
+++ b/tools/build-zip-archive.ps1
@@ -102,5 +102,5 @@ Write-Host "Build success!"
     Value = $timestamp
   }
   Get-FileHash -Algorithm SHA256 $destPath
-  Get-FileHash -Algorithm SHA256 $pdbPath
+  # Get-FileHash -Algorithm SHA256 $pdbPath
 ) | Format-List