diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f41ec93da..d403d8ed9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,6 +13,7 @@ env:
   eol_months:    12
   qt_version:    5.15.0
   bitrock_version: qt-professional-20.6.0
+  bitrock_url:     https://clients.bitrock.com/installbuilder
 
 jobs:
 
@@ -84,7 +85,7 @@ jobs:
           doc: true
       - name: Download InstallBuilder
         run: |
-          wget -O ~/installbuilder.run https://installbuilder.com/installbuilder-${{ env.bitrock_version }}-linux-x64-installer.run
+          wget -O ~/installbuilder.run ${{ env.bitrock_url }}/installbuilder-${{ env.bitrock_version }}-linux-x64-installer.run
           chmod 700 ~/installbuilder.run
           ~/installbuilder.run --mode unattended --prefix ~/installbuilder
           cat >~/license.xml <<EOF
@@ -171,7 +172,7 @@ jobs:
           extra: --archives qtbase
       - name: Download InstallBuilder
         run: |
-          curl.exe --output "$HOME\installbuilder.exe" -L --url https://installbuilder.com/installbuilder-${{ env.bitrock_version }}-windows-x64-installer.exe
+          curl.exe --output "$HOME\installbuilder.exe" -L --url ${{ env.bitrock_url }}/installbuilder-${{ env.bitrock_version }}-windows-x64-installer.exe
           start -wait "$HOME\installbuilder.exe" @("--mode", "unattended", "--prefix", "$HOME\installbuilder")
           echo >$HOME\license.xml @"
           $env:BITROCK_LICENSE
@@ -254,7 +255,7 @@ jobs:
           extra: --archives qtbase
       - name: Download InstallBuilder
         run: |
-          curl.exe --output "$HOME\installbuilder.exe" -L --url https://installbuilder.com/installbuilder-${{ env.bitrock_version }}-windows-installer.exe
+          curl.exe --output "$HOME\installbuilder.exe" -L --url ${{ env.bitrock_url }}/installbuilder-${{ env.bitrock_version }}-windows-installer.exe
           start -wait "$HOME\installbuilder.exe" @("--mode", "unattended", "--prefix", "$HOME\installbuilder")
           echo >$HOME\license.xml @"
           $env:BITROCK_LICENSE
@@ -322,7 +323,7 @@ jobs:
           aqtversion: ==0.9.2
       - name: Download InstallBuilder
         run: |
-          wget -O $HOME/installbuilder.dmg https://installbuilder.com/installbuilder-${{ env.bitrock_version }}-osx-installer.dmg
+          wget -O $HOME/installbuilder.dmg ${{ env.bitrock_url }}/installbuilder-${{ env.bitrock_version }}-osx-installer.dmg
           chmod 700 $HOME/installbuilder.dmg
           sudo hdiutil attach $HOME/installbuilder.dmg
           sudo cp -rf "/Volumes/InstallBuilder Qt/installbuilder-${{ env.bitrock_version }}-osx-installer.app" /Applications