diff --git a/.github/workflows/stack.yml b/.github/workflows/stack.yml
index cc722eb84..6b3c3f0b4 100644
--- a/.github/workflows/stack.yml
+++ b/.github/workflows/stack.yml
@@ -16,7 +16,7 @@ jobs:
         - { build: stack, resolver: "--resolver lts-10"  }   # ghc-8.2.2
         - { build: stack, resolver: "--resolver lts-11"  }   # ghc-8.2.2
         - { build: stack, resolver: "--resolver lts-12"  }   # ghc-8.4.4
-        - { build: stack, resolver: "--resolver lts-13"  }  redundant because lts-14 checks ghc-8.6 already
+        - { build: stack, resolver: "--resolver lts-13"  }   # redundant because lts-14 checks ghc-8.6 already
         - { build: stack, resolver: "--resolver lts-14"  }   # ghc-8.6.5
         - { build: stack, resolver: "--resolver nightly" }
         # - { build: stack, resolver: ""                   }