diff --git a/src/doc/conf.py b/src/doc/conf.py
index c3926288018b2e614ab268247e247605635d70ec..b05fa1c71c1dcd0b59916594818449d2ebc574bd 100644
--- a/src/doc/conf.py
+++ b/src/doc/conf.py
@@ -19,8 +19,7 @@ import os
 import sys
 sys.path.insert(0, os.path.abspath('..'))
 
-
-import sphinx_rtd_theme
+import sphinx_rtd_theme  # noqa: E402
 
 
 # -- Project information -----------------------------------------------------