diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c83b1e9..58ab524 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -46,9 +46,9 @@ build_and_test:
 
       - name: build hipo
         run: |
-	  cd $HIPO
-	  cmake -DCMAKE_INSTALL_PREFIX=$HIPO
-	  cmake --build . --target install
+          cd $HIPO
+          cmake -DCMAKE_INSTALL_PREFIX=$HIPO
+          cmake --build . --target install
 
       - name: build ccdb
         run: |