diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 48eff8e0..9f57488d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        ghc: ['9.8.2', '9.6.3', '9.4.7', '9.2.8', '9.0.2', '8.10.7', '8.8.4', '8.6.5']
+        ghc: ['9.8.2', '9.6.3', '9.4.7', '9.2.8', '9.0.2', '8.10.7']
         include:
         - os: windows-latest
         # Testing on MacOS is disabled until GitHub actions support 'allow-failure'
diff --git a/algebraic-graphs.cabal b/algebraic-graphs.cabal
index 64a17895..26384120 100644
--- a/algebraic-graphs.cabal
+++ b/algebraic-graphs.cabal
@@ -12,7 +12,7 @@ homepage:      https://github.com/snowleopard/alga
 bug-reports:   https://github.com/snowleopard/alga/issues
 category:      Algebra, Algorithms, Data Structures, Graphs
 build-type:    Simple
-tested-with:   GHC==9.8.2, GHC==9.6.3, GHC==9.4.7, GHC==9.2.8, GHC==9.0.2, GHC==8.10.7, GHC==8.8.4, GHC==8.6.5
+tested-with:   GHC==9.8.2, GHC==9.6.3, GHC==9.4.7, GHC==9.2.8, GHC==9.0.2, GHC==8.10.7
 description:
     <https://github.com/snowleopard/alga Alga> is a library for algebraic construction and
     manipulation of graphs in Haskell. See <https://github.com/snowleopard/alga-paper this paper>