diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,10 @@
 # Changelog for commonmark-pandoc
 
+## 0.2.1
+
+- commonmark-pandoc.cabal: remove unneeded build-depend on containers.
+- Support wikilinks extension.
+
 ## 0.2.0.1
 
 - Allow pandoc-types 1.22.
diff --git a/commonmark-pandoc.cabal b/commonmark-pandoc.cabal
--- a/commonmark-pandoc.cabal
+++ b/commonmark-pandoc.cabal
@@ -1,5 +1,5 @@
 name:           commonmark-pandoc
-version:        0.2.0.1
+version:        0.2.1
 synopsis:       Bridge between commonmark and pandoc AST.
 description:    This library provides typeclasses for rendering
                 commonmark to Pandoc types.
@@ -8,7 +8,7 @@
 bug-reports:    https://github.com/jgm/commonmark-hs/issues
 author:         John MacFarlane
 maintainer:     jgm@berkeley.edu
-copyright:      2018-2020 John MacFarlane
+copyright:      2018-2021 John MacFarlane
 license:        BSD3
 license-file:   LICENSE
 build-type:     Simple
@@ -27,11 +27,12 @@
       src
   build-depends:
       base >= 4.9 && <5
-    , commonmark >= 0.1 && < 0.2
-    , commonmark-extensions >= 0.2 && < 0.3
+    , commonmark >= 0.2 && < 0.3
+    , commonmark-extensions >= 0.2.1 && < 0.3
     , pandoc-types >= 1.21 && < 1.23
     , text
-    , containers
+  if impl(ghc >= 8.10)
+    ghc-options:      -Wunused-packages
   if impl(ghc >= 8.8)
     ghc-options:  -fwrite-ide-info -hiedir=.hie
   exposed-modules:
diff --git a/src/Commonmark/Pandoc.hs b/src/Commonmark/Pandoc.hs
--- a/src/Commonmark/Pandoc.hs
+++ b/src/Commonmark/Pandoc.hs
@@ -23,6 +23,7 @@
 import Commonmark.Entity (lookupEntity)
 import Commonmark.Extensions.Math
 import Commonmark.Extensions.Emoji
+import Commonmark.Extensions.Wikilinks
 import Commonmark.Extensions.PipeTable
 import Commonmark.Extensions.Strikethrough
 import Commonmark.Extensions.Superscript
@@ -120,6 +121,9 @@
 instance HasEmoji (Cm b B.Inlines) where
   emoji kw t = Cm $ B.spanWith ("",["emoji"],[("data-emoji",kw)])
                   $ B.text t
+
+instance HasWikilinks (Cm b B.Inlines) where
+  wikilink t il = Cm $ B.link t "wikilink" $ unCm il
 
 instance HasPipeTable (Cm a B.Inlines) (Cm a B.Blocks) where
   pipeTable aligns headerCells rows =