diff --git a/Presentation/Yeamer.hs b/Presentation/Yeamer.hs
--- a/Presentation/Yeamer.hs
+++ b/Presentation/Yeamer.hs
@@ -235,6 +235,9 @@
        idc i
         | c <- toEnum $ fromEnum 'a' + i
         , c <= 'z'                        = Txt.singleton c
+        | c <- toEnum $ fromEnum '㐀' + i
+        , c <= '鿋'                       = Txt.singleton c
+        | otherwise                       = error "Too many grid cells to display."
        gridClass = "autogrid_"<>Txt.intercalate "-" (Txt.concat<$>gridRep)
        grids = [lucius|
                  div.#{gridClass} {
diff --git a/yeamer.cabal b/yeamer.cabal
--- a/yeamer.cabal
+++ b/yeamer.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                yeamer
-version:             0.1.0.4
+version:             0.1.0.5
 synopsis:            Yesod-based server for interactive presentation slides
 -- description:         
 homepage:            https://github.com/leftaroundabout/yeamer