diff --git a/flake.lock b/flake.lock
index bbfa984..0f47abe 100644
--- a/flake.lock
+++ b/flake.lock
@@ -35,11 +35,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1700538105,
-        "narHash": "sha256-uZhOCmwv8VupEmPZm3erbr9XXmyg7K67Ul3+Rx2XMe0=",
+        "lastModified": 1728279793,
+        "narHash": "sha256-W3D5YpNrUVTFPVU4jiEiboaaUDShaiH5fRl9aJLqUnU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "51a01a7e5515b469886c120e38db325c96694c2f",
+        "rev": "f85a2d005e83542784a755ca8da112f4f65c4aa4",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index bc12653..e79967e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -25,7 +25,7 @@
           services.redis."redis".enable = true;
         };
         haskellProjects.default = {
-          basePackages = pkgs.haskell.packages.ghc947;
+          basePackages = pkgs.haskell.packages.ghc96;
           autoWire = [ "packages" ];
         };
         packages.default = self'.packages.hedis;
diff --git a/src/Database/Redis/Sentinel.hs b/src/Database/Redis/Sentinel.hs
index d3a4f0d..17c0f56 100644
--- a/src/Database/Redis/Sentinel.hs
+++ b/src/Database/Redis/Sentinel.hs
@@ -55,6 +55,7 @@ import           Data.List.NonEmpty    (NonEmpty (..))
 import           Data.Typeable         (Typeable)
 import           Data.Unique
 import           Network.Socket        (HostName)
+import Control.Monad.IO.Class (liftIO)
 
 import           Database.Redis hiding (Connection, connect, runRedis)
 import qualified Database.Redis as Redis