diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 7da96ec..cc197c8 100755
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -19,6 +19,8 @@ jobs:
         - windows-latest
         resolver:
         - nightly
+        - lts-22
+        - lts-20
         - lts-18
         - lts-16
         - lts-14
diff --git a/stack.yaml b/stack.yaml
index c1ff3ac..bac72c9 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -4,4 +4,5 @@ packages:
 - xml-hamlet/
 - html-conduit/
 extra-deps:
-- cabal-doctest-1.0.9@sha256:b1fe3f3cc590c6d2c5ce8d5845e41a8a7d72621ed897b6c53312c1e772c2ab29,1467
+- git: https://github.com/haskellari/cabal-doctest.git
+  commit: '49e73ef34a82360c1664d20fb8adb56e2ce6e76e'