diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -47,6 +47,9 @@
 
     $ cat foo.csv | pandoc-placetable --widths="0.2 0.8" | pandoc -f json -o output.html
 
+(For this use-case, you might not even need pandoc-placetable; pandoc 2.9.2 and later ships
+with a simple built-in csv-reader: `pandoc foo.csv -o output.html`)
+
 All options are optional and are specified as follows (cf. `pandoc-placetable -h`):
 
 - **csv**: The path or URL to the CSV file that is appended to the code block's content
diff --git a/pandoc-placetable.cabal b/pandoc-placetable.cabal
--- a/pandoc-placetable.cabal
+++ b/pandoc-placetable.cabal
@@ -1,5 +1,5 @@
 Name:                 pandoc-placetable
-Version:              0.5.1
+Version:              0.6
 Build-Type:           Simple
 Synopsis:             Pandoc filter to include CSV files
 Description:          A Pandoc filter that replaces code blocks (that have the class `table`)
@@ -37,9 +37,9 @@
                       http-conduit >= 2.1.11,
                       spreadsheet >= 0.1.3,
                       explicit-exception >= 0.1.0,
-                      pandoc-types >= 1.12.0.0
+                      pandoc-types >= 1.20
   If flag(inlineMarkdown)
-    Build-Depends:    pandoc >= 2.1
+    Build-Depends:    pandoc >= 2.9
     cpp-options:      -DINLINE_MARKDOWN
   Buildable:          True
   Default-Language:   Haskell2010
diff --git a/pandoc-placetable.hs b/pandoc-placetable.hs
--- a/pandoc-placetable.hs
+++ b/pandoc-placetable.hs
@@ -1,4 +1,5 @@
 {-# LANGUAGE CPP #-}
+{-# LANGUAGE OverloadedStrings #-}
 
 module Main where
 import Data.Aeson (encode)
@@ -184,9 +185,9 @@
 
 
 -- flatten key-value tuples to commandline argument-like strings
-kvsToArgs :: [(String, String)] -> [String]
+kvsToArgs :: [(T.Text, T.Text)] -> [String]
 kvsToArgs [] = []
-kvsToArgs ((k,v):rest) = ("--" ++ k) : v : (kvsToArgs rest)
+kvsToArgs ((k,v):rest) = ("--" ++ T.unpack k) : T.unpack v : (kvsToArgs rest)
 
 
 httpConduitManager :: IO Manager
@@ -197,16 +198,17 @@
 placeTable (CodeBlock (ident, cls, kvs) txt) | "table" `elem` cls = do
   (opts, _) <- rawArgsToOpts $ kvsToArgs kvs
   csv  <- fromMaybe (return "") (optCsv opts)
-  let s = if null txt
+  let s = if T.null txt
              then csv
-             else txt ++ "\n" ++ csv
+             else T.unpack txt ++ "\n" ++ csv
   let csvTable = csvToTable opts s
-  return $ toList $ if null ident && null kvs'
+  return $ toList $ if T.null ident && null kvs'
                        then csvTable
                        else divWith (ident,cls,kvs') csvTable
   where
-    kvs' = filter (\(k,_) -> not $ elem k $ concatMap getNames options) kvs
-    getNames (Option _ ns _ _) = ns
+    kvs' = filter (\(k,_) -> k `notElem` optWhitelist) kvs
+    optWhitelist = concatMap getNames options
+    getNames (Option _ ns _ _) = map T.pack ns
 placeTable a = return [a]
 
 
@@ -264,7 +266,7 @@
               else plain $ str s
 #else
     strToInlines [] = mempty
-    strToInlines s  = str s
+    strToInlines s  = str $ T.pack s
     strToBlocks  [] = mempty
-    strToBlocks  s  = plain $ str s
+    strToBlocks  s  = plain $ str $ T.pack s
 #endif
diff --git a/stack.yaml b/stack.yaml
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-11.7
+resolver: lts-15.4
 
 packages:
 - '.'