diff --git a/pkgs/development/tools/parsing/tree-sitter/grammars/grammar-sources.nix b/pkgs/development/tools/parsing/tree-sitter/grammars/grammar-sources.nix
index b7502a19fcdb..7360c7a66d6b 100644
--- a/pkgs/development/tools/parsing/tree-sitter/grammars/grammar-sources.nix
+++ b/pkgs/development/tools/parsing/tree-sitter/grammars/grammar-sources.nix
@@ -923,10 +923,30 @@
   };
 
   go-template = {
-    version = "0-unstable-2025-12-12";
+    version = "0-unstable-2026-03-21";
     url = "github:ngalaiko/tree-sitter-go-template";
-    rev = "c59999dc449c29549f5735eaac31b938a13b6c14";
-    hash = "sha256-YKqpNkCRLX+89Ottw4KVXxrEsIPRUsWs0UwIgucHwdo=";
+    rev = "aa71f63de226c5592dfbfc1f29949522d7c95fac";
+    hash = "sha256-QSzUyRDGdBH9TaG3YCHnJp12WcR8kdbsZFIk8I+JW1Y=";
+    meta = {
+      license = lib.licenses.mit;
+      maintainers = with lib.maintainers; [
+        azahi
+      ];
+    };
+  };
+
+  go-template-helm = {
+    version = "0-unstable-2026-03-21";
+    url = "github:ngalaiko/tree-sitter-go-template";
+    rev = "aa71f63de226c5592dfbfc1f29949522d7c95fac";
+    hash = "sha256-QSzUyRDGdBH9TaG3YCHnJp12WcR8kdbsZFIk8I+JW1Y=";
+    location = "dialects/helm";
+    meta = {
+      license = lib.licenses.mit;
+      maintainers = with lib.maintainers; [
+        azahi
+      ];
+    };
   };
 
   godot-resource = {