diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index f80cdb6..1794915 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -43,6 +43,36 @@ jobs:
             compilerVersion: 9.2.8
             setup-method: ghcup
             allow-failure: false
+          - compiler: ghc-9.0.2
+            compilerKind: ghc
+            compilerVersion: 9.0.2
+            setup-method: ghcup
+            allow-failure: false
+          - compiler: ghc-8.10.7
+            compilerKind: ghc
+            compilerVersion: 8.10.7
+            setup-method: ghcup
+            allow-failure: false
+          - compiler: ghc-8.8.4
+            compilerKind: ghc
+            compilerVersion: 8.8.4
+            setup-method: hvr-ppa
+            allow-failure: false
+          - compiler: ghc-8.6.5
+            compilerKind: ghc
+            compilerVersion: 8.6.5
+            setup-method: hvr-ppa
+            allow-failure: false
+          - compiler: ghc-8.4.4
+            compilerKind: ghc
+            compilerVersion: 8.4.4
+            setup-method: hvr-ppa
+            allow-failure: false
+          - compiler: ghc-8.2.2
+            compilerKind: ghc
+            compilerVersion: 8.2.2
+            setup-method: hvr-ppa
+            allow-failure: false
           - compiler: ghc-8.0.2
             compilerKind: ghc
             compilerVersion: 8.0.2
@@ -174,8 +204,8 @@ jobs:
           touch cabal.project
           touch cabal.project.local
           echo "packages: ${PKGDIR_pandoc_builder_monadic}" >> cabal.project
-          if [ $((HCNUMVER >= 90200)) -ne 0 ] ; then echo "package pandoc-builder-monadic" >> cabal.project ; fi
-          if [ $((HCNUMVER >= 90200)) -ne 0 ] ; then echo "    ghc-options: -Werror=missing-methods" >> cabal.project ; fi
+          if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then echo "package pandoc-builder-monadic" >> cabal.project ; fi
+          if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then echo "    ghc-options: -Werror=missing-methods" >> cabal.project ; fi
           cat >> cabal.project <<EOF
           EOF
           $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(pandoc-builder-monadic)$/; }' >> cabal.project.local
diff --git a/pandoc-builder-monadic.cabal b/pandoc-builder-monadic.cabal
index 7e06ab7..575d4e8 100644
--- a/pandoc-builder-monadic.cabal
+++ b/pandoc-builder-monadic.cabal
@@ -14,7 +14,16 @@ maintainer:      owen@owen.cafe
 category:        Text
 build-type:      Simple
 extra-source-files: README.md CHANGELOG.md
-tested-with:     GHC==9.6.2, GHC==9.4.5, GHC==9.2.8, GHC==8.0.2
+tested-with:        GHC==9.6.2
+                  , GHC==9.4.5
+                  , GHC==9.2.8
+                  , GHC==9.0.2
+                  , GHC==8.10.7
+                  , GHC==8.8.4
+                  , GHC==8.6.5
+                  , GHC==8.4.4
+                  , GHC==8.2.2
+                  , GHC==8.0.2
 
 common warnings
     ghc-options: -Wall -Wextra -Wunused-packages