diff --git a/pkgs/misc/vscode-extensions/default.nix b/pkgs/misc/vscode-extensions/default.nix
index 0a8174689577..8e78a28f79d2 100644
--- a/pkgs/misc/vscode-extensions/default.nix
+++ b/pkgs/misc/vscode-extensions/default.nix
@@ -823,8 +823,8 @@ let
         mktplcRef = {
           name = "haskell";
           publisher = "haskell";
-          version = "1.1.0";
-          sha256 = "1wg06lyk0qn9jd6gi007sg7v0z9z8gwq7x2449d4ihs9n3w5l0gb";
+          version = "1.6.1";
+          sha256 = "1l6nrbqkq1p62dkmzs4sy0rxbid3qa1104s3fd9fzkmc1sldzgsn";
         };
         meta = with lib; {
           license = licenses.mit;
@@ -972,8 +972,8 @@ let
         mktplcRef = {
           name = "language-haskell";
           publisher = "justusadam";
-          version = "3.2.1";
-          sha256 = "0lxp8xz17ciy93nj4lzxqvz71vw1zdyamrnh2n792yair8890rr6";
+          version = "3.4.0";
+          sha256 = "0ab7m5jzxakjxaiwmg0jcck53vnn183589bbxh3iiylkpicrv67y";
         };
         meta = {
           license = lib.licenses.bsd3;