diff --git a/cabal.project b/cabal.project
index bc617093c..8e56ca0a4 100644
--- a/cabal.project
+++ b/cabal.project
@@ -13,6 +13,12 @@ source-repository-package
   location: https://github.com/jgm/texmath.git
   tag: 46df85d747f4f233157d3476683264232a4f58be
 
+source-repository-package
+  type: git
+  location: https://github.com/jgm/commonmark-hs
+  tag: 4d460b206e0b1872376db86cadf7a4567eeddaed
+  subdir: commonmark-pandoc
+
 source-repository-package
   type: git
   location: https://github.com/jgm/ipynb.git
diff --git a/stack.yaml b/stack.yaml
index a76508782..702e3a780 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -39,6 +39,9 @@ extra-deps:
   commit: 00246af10885c2ad4413ace4f69a7e6c88297a08
 - git: https://github.com/pandoc/pandoc-lua-marshal
   commit: 45e53d9dce37d20f8e30e0d297a43c5b4c4a6831
+- git: https://github.com/jgm/commonmark-hs
+  commit: 4d460b206e0b1872376db86cadf7a4567eeddaed
+  subdir: commonmark-pandoc
 ghc-options:
    "$locals": -fhide-source-paths -Wno-missing-home-modules
 resolver: lts-18.10