diff --git a/cabal.project b/cabal.project
index 4ca6da52e630..e7522cdbe99f 100644
--- a/cabal.project
+++ b/cabal.project
@@ -9,3 +9,7 @@ constraints: skylighting-format-blaze-html >= 0.1.1.3,
              -- for now (commercialhaskell/stackage#7545):
              data-default-class <= 0.2, data-default <= 0.8
 
+source-repository-package
+  type: git
+  location: https://github.com/jgm/texmath.git
+  tag: 178226929f9f6af749da68af830cbc49793abfa2
diff --git a/stack.yaml b/stack.yaml
index e4db414724f8..0f9df1fc715d 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -13,6 +13,8 @@ extra-deps:
 - citeproc-0.8.1.2
 - skylighting-core-0.14.5
 - skylighting-0.14.5
+- git: https://github.com/jgm/texmath.git
+  commit: 178226929f9f6af749da68af830cbc49793abfa2
 ghc-options:
    "$locals": -fhide-source-paths -Wno-missing-home-modules
 resolver: lts-23.0