diff --git a/core/Parsing.Documents.fs b/core/Parsing.Documents.fs
index d456176..fef3409 100644
--- a/core/Parsing.Documents.fs
+++ b/core/Parsing.Documents.fs
@@ -228,11 +228,17 @@ let mutable languages = [
     lang "XML" "xsl" ".xml|.xsl"
         html
     lang "YAML" "" ".yaml|.yml"
-        /// Also allow text paragraphs to be wrapped. Though wrapping the whole
-        /// file at once will mess it up.
+        // Also allow text paragraphs to be wrapped. Though wrapping the whole
+        // file at once will mess it up.
         <| toNewDocProcessor (fun settings ->
             let comments = oldLine "#{1,3}" settings
             takeUntil comments (oldPlainText settings) |> repeatToEnd)
+    lang "Zig" "" ".zig|.zon"
+        ( oldSourceCode
+            [ customLine DocComments.javadoc "//[/!]"
+              cLine
+            ]
+        )
     ]
 
 /// Creates a custom language parser, if the given CustomMarkers are valid. Also
diff --git a/core/Tests.fs b/core/Tests.fs
index 8f2d680..032745f 100644
--- a/core/Tests.fs
+++ b/core/Tests.fs
@@ -271,7 +271,7 @@ type Results = {passes:int; failures:int; errors:int}
 
 [<EntryPoint>]
 let main argv =
-  let norm (s: String) = s.ToLower().Replace('\\', '/')
+  let norm (s: String) = s.Replace('\\', '/')
   let argv = Array.map norm argv
   let inArgv (f: string) = argv |> Array.exists (fun a -> f.EndsWith (a))
   let filesToTest =
diff --git a/docs/specs/content-types/zig.md b/docs/specs/content-types/zig.md
new file mode 100644
index 0000000..f382e3c
--- /dev/null
+++ b/docs/specs/content-types/zig.md
@@ -0,0 +1,17 @@
+> language: "zig"
+
+Zig uses comment formats that might be familiar if you use Doxygen (C/C++) but there are
+no multi-line block comments.
+
+    // a b c       ->      // a b ¦
+    // d   ¦               // c d ¦
+
+Doc comments:
+
+    /// a b c       ->      /// a b ¦
+    /// d   ¦               /// c d ¦
+
+Top-level doc comments:
+
+    //! a b c       ->      //! a b ¦
+    //! d   ¦               //! c d ¦
diff --git a/package.json b/package.json
index 641eaca..ed0ce73 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "@typescript-eslint/parser": "^5.12.0",
     "eslint": "^8.9.0",
     "log-update": "^5.0.0",
-    "parcel": "^2.3.2",
+    "parcel": "^2.10.2",
     "typescript": "^4.5.5",
     "vsce": "^2.6.7",
     "vscode-test": "^1.6.1"