diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -3,6 +3,9 @@
 ## Unreleased changes
 ## Unreleased changes
 
+0.3.1.0 Jan 15 2021
+  - Slightly improved formatting with SkyLighting and LaTeX
+
 0.3.0.0 Jan 15 2021
   - Support default syntaxes from skylighting.
 
diff --git a/pandoc-filter-indent.cabal b/pandoc-filter-indent.cabal
--- a/pandoc-filter-indent.cabal
+++ b/pandoc-filter-indent.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 54950c09cdef3ae347be5565c51f866814024d8f3304665a2873a0acdf7c41a2
+-- hash: 6e1538de590d6fe1a3833c723678f5325ccaba06a7fd8be199cc2b56ffa6d038
 
 name:           pandoc-filter-indent
-version:        0.3.0.0
+version:        0.3.1.0
 synopsis:       Pandoc filter formatting Haskell code fragments using GHC lexer.
 description:    Formats marked code fragments, and allows `pandoc` to safely process rest of your literate program:
                 .
diff --git a/src/Render/Latex.hs b/src/Render/Latex.hs
--- a/src/Render/Latex.hs
+++ b/src/Render/Latex.hs
@@ -143,7 +143,8 @@
 formatToken (TOther,   "}"     ) = protectText "}"
 formatToken (TOther,   "{"     ) = protectText "{"
 -- formatToken (TBlank,   txt     ) = "\\textit{\\textcolor{gray}{" <> protectText txt <> "}}"
-formatToken (_,        txt     ) = "\\textit{"     <> protectText txt  <> "}"
+formatToken (TVar,        txt     ) = "\\textit{"     <> protectText txt  <> "}"
+formatToken (_,  txt     ) = "\\textrm{"     <> protectText txt  <> "}"
 
 mathop :: Text -> Text
 mathop code = "\\" <> code
diff --git a/src/Token.hs b/src/Token.hs
--- a/src/Token.hs
+++ b/src/Token.hs
@@ -30,6 +30,7 @@
   | TVar
   | TNum
   | TOther
+  | TString
   | TTikz  Text -- TikZmark in a comment
   deriving (Eq, Ord, Show)
 
diff --git a/src/Token/Haskell.hs b/src/Token/Haskell.hs
--- a/src/Token/Haskell.hs
+++ b/src/Token/Haskell.hs
@@ -53,6 +53,8 @@
 haskellTok OperatorTok    = TOperator
 haskellTok RationalTok    = TNum
 haskellTok IntegerTok     = TNum
+haskellTok StringTok      = TString
+haskellTok CharTok        = TString
 haskellTok t              = TOther
 
 -- | Extract line number from `ghc-lib` slice location.
diff --git a/src/Token/Skylighting.hs b/src/Token/Skylighting.hs
--- a/src/Token/Skylighting.hs
+++ b/src/Token/Skylighting.hs
@@ -56,24 +56,25 @@
 -- | Convert token type of `ghc-lib` into tokens recognized by the filter.
 skyTok :: TokenType -> MyTok
 skyTok FloatTok  = TNum
-skyTok FloatTok  = TNum
 skyTok DecValTok  = TNum
 skyTok BaseNTok  = TNum
-skyTok StringTok = TOther
-skyTok VerbatimStringTok = TOther
-skyTok SpecialStringTok = TOther
-skyTok ConstantTok = TOther
+skyTok StringTok = TString
+skyTok CharTok = TString
+skyTok FunctionTok = TVar
+skyTok AttributeTok = TBlank
+skyTok VerbatimStringTok = TString
+skyTok SpecialStringTok = TCons
+skyTok ConstantTok = TCons
 skyTok KeywordTok = TKeyword
 skyTok BuiltInTok = TKeyword
-skyTok CharTok = TOther
-skyTok SpecialCharTok = TOther
+skyTok PreprocessorTok = TBlank
 skyTok CommentTok = TBlank
 skyTok DocumentationTok = TBlank
-skyTok CommentTok = TOther
+skyTok CommentTok = TBlank
 skyTok OperatorTok = TOperator
 skyTok SpecialCharTok = TOperator
 skyTok RegionMarkerTok = TOperator
-skyTok AnnotationTok = TOther
+skyTok AnnotationTok = TBlank
 skyTok ControlFlowTok = TKeyword
 skyTok VariableTok = TVar
 skyTok DataTypeTok = TCons