diff --git a/pkgs/applications/editors/vscode/extensions/default.nix b/pkgs/applications/editors/vscode/extensions/default.nix
index 859e1a364323..109e424bc4ec 100644
--- a/pkgs/applications/editors/vscode/extensions/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/default.nix
@@ -666,8 +666,8 @@ let
         mktplcRef = {
           name = "markdown-mermaid";
           publisher = "bierner";
-          version = "1.23.1";
-          hash = "sha256-hYWSeBXhqMcMxs+Logl5zRs4MlzBeHgCC07Eghmp0OM=";
+          version = "1.27.0";
+          hash = "sha256-09w/k1LlGYtyWWbVgoprJG/qB/zCuedF9Cu7kUXcNrE=";
         };
         meta = {
           changelog = "https://marketplace.visualstudio.com/items/bierner.markdown-mermaid/changelog";