diff --git a/pkgs/applications/editors/vscode/extensions/default.nix b/pkgs/applications/editors/vscode/extensions/default.nix
index 434172be58cb..4259a6c6e942 100644
--- a/pkgs/applications/editors/vscode/extensions/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/default.nix
@@ -675,8 +675,8 @@ let
         mktplcRef = {
           name = "markdown-mermaid";
           publisher = "bierner";
-          version = "1.29.0";
-          hash = "sha256-qjfZ2/otO2BAIbhjqicHI2H0KKdpji55K+2XfOrzUIw=";
+          version = "1.31.0";
+          hash = "sha256-7KpyUXR3a7ZD9bcdJ4t5HRjSAlUww8q6XSOcxHCN4Cw=";
         };
         meta = {
           changelog = "https://marketplace.visualstudio.com/items/bierner.markdown-mermaid/changelog";