diff --git a/src/Arguments.hs b/src/Arguments.hs
index 81b86b6..45b9bb6 100644
--- a/src/Arguments.hs
+++ b/src/Arguments.hs
@@ -60,7 +60,7 @@ blogConfig = BlogConfig
   <*> option filePath 'f' "favicon" "FILE" "path to the image to use for the blog's favicon"
   <*> option filePath 'H' "head" "FILE" "path to the file to add in the blog's head"
   <*> option str 'n' "name" "BLOG_NAME" "name of the blog"
-  <*> switch (short 'O' <> long "openGraphCards" <> help "enable Open Graph cards")
+  <*> switch (short 'O' <> long "open-graph-cards" <> help "enable Open Graph cards")
   <*> option filePath 'p' "pages"
         "DIRECTORY" "relative path to the directory containing the pages within INPUT_DIR"
   <*> Optparse.option auto (