diff --git a/crates/zensical/src/config/project.rs b/crates/zensical/src/config/project.rs
index 1cd7eb5..21d2e36 100644
--- a/crates/zensical/src/config/project.rs
+++ b/crates/zensical/src/config/project.rs
@@ -95,4 +95,6 @@ pub struct Project {
     pub plugins_hash: u64,
     /// Source files.
     pub source_files: Vec<(PathBuf, u64)>,
+    /// Snippet files.
+    pub snippet_files: Vec<(PathBuf, u64)>,
 }
diff --git a/crates/zensical/src/watcher.rs b/crates/zensical/src/watcher.rs
index 14df241..01ba3fc 100644
--- a/crates/zensical/src/watcher.rs
+++ b/crates/zensical/src/watcher.rs
@@ -121,6 +121,15 @@ impl Watcher {
                         return Err(Error::Disconnected);
                     }
 
+                    // Check if one of the source files managed by the Snippets
+                    // Markdown extension changed, and restart the build
+                    let mut iter = config.project.snippet_files.iter();
+                    if iter.any(|(path, _)| &*event.path() == path)
+                        && !seen.insert((*event.path()).clone())
+                    {
+                        return Err(Error::Disconnected);
+                    }
+
                     // Ignore events in the site directory, since they are files
                     // that were generated and should not trigger a rebuild. We
                     // forward them to the reload channel in the server instead,
@@ -198,6 +207,11 @@ impl Watcher {
             agent.watch(path)?;
         }
 
+        // Watch source files managed by Snippets Markdown extension
+        for (path, _) in &config.project.snippet_files {
+            agent.watch(path)?;
+        }
+
         // Watch site directory, ensuring it exists
         let site_dir = config.get_site_dir();
         fs::create_dir_all(&site_dir).unwrap();
diff --git a/python/zensical/config.py b/python/zensical/config.py
index 83dbb5f..ed41a4e 100644
--- a/python/zensical/config.py
+++ b/python/zensical/config.py
@@ -453,6 +453,10 @@ def _apply_defaults(config: dict, path: str) -> dict:
     # List all source files for mkdocstrings
     config["source_files"] = _list_sources(config, path)
 
+    # List all snippet files referenced in pymdownx.snippets configuration,
+    # so we can watch them and trigger a rebuild when they change
+    config["snippet_files"] = _list_snippet_files(config, path)
+
     # Hash all templates, so we rebuild if something changes
     config["template_hash"] = _hash(_list_templates(config))
 
@@ -541,6 +545,27 @@ def _list_sources(config: dict, config_file: str) -> list[tuple[str, int]]:
     return sorted(files_with_hash)
 
 
+def _list_snippet_files(
+    config: dict, config_file: str
+) -> list[tuple[str, int]]:
+    """List files referenced in pymdownx.snippets auto_append configuration."""
+    snippets_config = config["mdx_configs"].get("pymdownx.snippets", {})
+    auto_append = snippets_config.get("auto_append", [])
+    base_paths = snippets_config.get("base_path", ["."])
+
+    root = Path(config_file).parent.resolve()
+    files_with_mtime = []
+    for file_name in auto_append:
+        for base_path in base_paths:
+            candidate = root.joinpath(base_path, file_name).resolve()
+            if candidate.is_file():
+                mtime = int(os.path.getmtime(candidate))
+                files_with_mtime.append((str(candidate), mtime))
+                break
+
+    return sorted(files_with_mtime)
+
+
 def _list_templates(config: dict) -> list[tuple[str, int]]:
     """List all template files in the theme directories."""
     dirs = [get_theme_dir()]