diff --git a/.devcontainer/VERSION_MATRIX.md b/.devcontainer/VERSION_MATRIX.md
index 5b94ca92c333b4f7e76d64c156485f0734e18dff..3a58ed09c3a0dc37587c44bad5acb181a9b80ad2 100644
--- a/.devcontainer/VERSION_MATRIX.md
+++ b/.devcontainer/VERSION_MATRIX.md
@@ -6,7 +6,7 @@
 |:------------------------------|:----------|:----------|:--------------------------------------------------- |
 | latest<br>9.10.1<br>9.10<br>9 | 3.12.1.0  | ≥ 2.13.1  | latest<br>2.9.0.1<br>2.9.0.0                        |
 | 9.8.2<br>9.8                  | 3.10.3.0  | ≥ 2.13.1  | 2.9.0.1<br>2.9.0.0<br>2.8.0.0<br>2.7.0.0<br>2.6.0.0 |
-| 9.6.6<br>9.6                  | 3.10.3.0  | ≥ 2.13.1  | 2.9.0.1<br>2.7.0.0                                  |
+| 9.6.6<br>9.6                  | 3.10.3.0  | ≥ 2.13.1  | 2.9.0.1                                             |
 
 [^1]: built-in version; see [GHC musl > Version Matrix](../VERSION_MATRIX.md)
 
diff --git a/.devcontainer/ghc-9.6/devcontainer.json b/.devcontainer/ghc-9.6/devcontainer.json
index e489ed3b8a474fb8ba1dbeb4d6fce980d2aac7da..4fbcef2401fc74ef5b00956fd6dbfd75c96b9a1f 100644
--- a/.devcontainer/ghc-9.6/devcontainer.json
+++ b/.devcontainer/ghc-9.6/devcontainer.json
@@ -5,7 +5,7 @@
     "context": "..",
     "args": {
       "GHC_VERSION": "9.6",
-      "HLS_VERSION": "2.7.0.0",
+      "HLS_VERSION": "2.9.0.1",
       "STACK_VERSION": "2.15.5",
       "USE_ZSH_FOR_ROOT": "unset-to-use-ash",
       "SET_LANG": "C.UTF-8",