diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 461edde45e8b..12ed0b404962 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -318,8 +318,8 @@ jobs:
         path: ${{ env.SDL2_FRAMEWORK }}
         key: ${{ matrix.os }}-sdl2-${{ hashFiles('.github/workflows/ci.yml', 'EndlessSky.xcodeproj/**', 'utils/set_dylibs_rpath.sh', 'utils/fetch_sdl2_framework.sh') }}
     - name: Compile Engine
-	  if: steps.cache-artifact0.outputs.cache-hit != 'true'
-	  run: xcodebuild -target "ES_Engine" -configuration "Release" -jobs $(sysctl -n hw.logicalcpu) -quiet
+      if: steps.cache-artifact0.outputs.cache-hit != 'true'
+      run: xcodebuild -target "ES_Engine" -configuration "Release" -jobs $(sysctl -n hw.logicalcpu) -quiet
     - name: Compile Game
       if: steps.cache-artifact1.outputs.cache-hit != 'true'
       run: xcodebuild -target "Endless Sky" -configuration "Release" -jobs $(sysctl -n hw.logicalcpu) -quiet
@@ -330,7 +330,7 @@ jobs:
       if: steps.cache-artifact0.outputs.cache-hit != 'true'
       run: mv "build/Release/ES_Engine.framework/Versions/A" .
     - name: Upload engine framework
-	  uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v2
       with:
         name: binary-${{ matrix.os }}
         path: ${{ env.ARTIFACT0 }}