diff --git a/.gitignore b/.gitignore
index d053335d..86a7c29d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 # Windows image file caches
-Thumbs.db 
+Thumbs.db
 
 # Folder config file
 Desktop.ini
@@ -82,4 +82,7 @@ tools/xunit.runner.console
 
 # New VS Test Runner creates arbitrary folders with PDBs
 *.pdb
-pingme.txt
\ No newline at end of file
+pingme.txt
+
+# ReadTheDocs build output
+docs/_build