diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 58b586d..83405d1 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -38,7 +38,7 @@ jobs:
 
       - name: bootstrap
         run: |
-	  cd guide
+          cd guide
           make pdf
 
       - name: Upload some pdfs