diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 50039becbd..544a9c6e78 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -160,8 +160,7 @@ jobs:
         name: Test hls-splice-plugin
         run: cabal test hls-splice-plugin-tests || cabal test hls-splice-plugin-tests
 
-      # TODO enable when it supports 9.10
-      - if: matrix.test && matrix.ghc != '9.10'
+      - if: matrix.test
         name: Test hls-stan-plugin
         run: cabal test hls-stan-plugin-tests || cabal test hls-stan-plugin-tests
 
diff --git a/cabal.project b/cabal.project
index bacb35e745..08d743c24e 100644
--- a/cabal.project
+++ b/cabal.project
@@ -8,7 +8,7 @@ packages:
          ./hls-test-utils
 
 
-index-state:  2024-08-22T00:00:00Z
+index-state:  2024-10-21T00:00:00Z
 
 tests: True
 test-show-details: direct
diff --git a/docs/support/plugin-support.md b/docs/support/plugin-support.md
index 895cfda25b..ee833347fd 100644
--- a/docs/support/plugin-support.md
+++ b/docs/support/plugin-support.md
@@ -65,6 +65,6 @@ For example, a plugin to provide a formatter which has itself been abandoned has
 | `hls-overloaded-record-dot-plugin`  | 2    |                          |
 | `hls-semantic-tokens-plugin`        | 2    |                          |
 | `hls-floskell-plugin`               | 3    | 9.10.1                   |
-| `hls-stan-plugin`                   | 3    | 9.10.1                   |
+| `hls-stan-plugin`                   | 3    |                          |
 | `hls-retrie-plugin`                 | 3    | 9.10.1                   |
 | `hls-splice-plugin`                 | 3    | 9.10.1                   |
diff --git a/haskell-language-server.cabal b/haskell-language-server.cabal
index 447882a61e..1f5fce4b5f 100644
--- a/haskell-language-server.cabal
+++ b/haskell-language-server.cabal
@@ -791,13 +791,13 @@ flag stan
   manual:      True
 
 common stan
-  if flag(stan) && impl(ghc < 9.10.0)
+  if flag(stan)
     build-depends: haskell-language-server:hls-stan-plugin
     cpp-options: -Dhls_stan
 
 library hls-stan-plugin
   import:           defaults, pedantic, warnings
-  if flag(stan) && impl(ghc < 9.10.0)
+  if flag(stan)
     buildable: True
   else
     buildable: False
@@ -825,7 +825,7 @@ library hls-stan-plugin
 
 test-suite hls-stan-plugin-tests
   import:           defaults, pedantic, test-defaults, warnings
-  if flag(stan) && impl(ghc < 9.10.0)
+  if flag(stan)
     buildable: True
   else
     buildable: False