diff --git a/docs/server-implementation.md b/docs/server-implementation.md
index 97351ad..f7fde97 100644
--- a/docs/server-implementation.md
+++ b/docs/server-implementation.md
@@ -245,7 +245,7 @@ add_action('init', function() {
 Every signed response includes:
 
 | Header | Description | Example |
-|--------|-------------|---------|
+| -------- | ------------- | --------- |
 | `X-License-Signature` | HMAC-SHA256 signature (hex) | `a1b2c3d4...` (64 chars) |
 | `X-License-Timestamp` | Unix timestamp when signed | `1706000000` |