diff --git a/atlas.json b/atlas.json
index 43438cb7..0246d5e0 100644
--- a/atlas.json
+++ b/atlas.json
@@ -19,5 +19,5 @@
       "toc": true
     }
   },
-  "theme": "oreillymedia/atlas_trade_theme"
+  "theme": "oreillymedia/atlas_tech1c_theme"
 }
\ No newline at end of file