diff --git a/pkgs/applications/editors/vscode/extensions/default.nix b/pkgs/applications/editors/vscode/extensions/default.nix
index f5f94e7923dd..acb16aeb8328 100644
--- a/pkgs/applications/editors/vscode/extensions/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/default.nix
@@ -668,8 +668,8 @@ let
         mktplcRef = {
           name = "markdown-mermaid";
           publisher = "bierner";
-          version = "1.27.0";
-          hash = "sha256-09w/k1LlGYtyWWbVgoprJG/qB/zCuedF9Cu7kUXcNrE=";
+          version = "1.28.0";
+          hash = "sha256-NAQD6DK1c13nA/O0QHNxFraImE6C0+Jzj9+f06EkiW0=";
         };
         meta = {
           changelog = "https://marketplace.visualstudio.com/items/bierner.markdown-mermaid/changelog";