diff --git a/README.md b/README.md
index 256ae41f..67fe8be8 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 ## INSTALL
 ```sh
+sudo apt install php-yaml
 git clone https://github.com/plepe/openstreetbrowser.git
 cd openstreetbrowser
 npm install
diff --git a/src/RepositoryDir.php b/src/RepositoryDir.php
index ff273cd8..07e33667 100644
--- a/src/RepositoryDir.php
+++ b/src/RepositoryDir.php
@@ -33,6 +33,7 @@ class RepositoryDir extends RepositoryBase {
     while ($f = readdir($d)) {
       if (preg_match("/^([0-9a-zA-Z_\-]+)\.json$/", $f, $m) && $f !== 'package.json') {
         $d1 = json_decode(file_get_contents("{$this->path}/{$f}"), true);
+        $d1['format'] = 'json';
 
 	if (!$this->isCategory($d1)) {
 	  continue;
@@ -41,6 +42,17 @@ class RepositoryDir extends RepositoryBase {
         $data['categories'][$m[1]] = jsonMultilineStringsJoin($d1, array('exclude' => array(array('const'), array('filter'))));
       }
 
+      if (preg_match("/^([0-9a-zA-Z_\-]+)\.yaml$/", $f, $m)) {
+        $d1 = yaml_parse(file_get_contents("{$this->path}/{$f}"));
+        $d1['format'] = 'yaml';
+
+	if (!$this->isCategory($d1)) {
+	  continue;
+	}
+
+        $data['categories'][$m[1]] = $d1;
+      }
+
       if (preg_match("/^(detailsBody|popupBody).html$/", $f, $m)) {
 	$data['templates'][$m[1]] = file_get_contents("{$this->path}/{$f}");
       }
diff --git a/src/RepositoryGit.php b/src/RepositoryGit.php
index 23865108..eafdfb2d 100644
--- a/src/RepositoryGit.php
+++ b/src/RepositoryGit.php
@@ -71,6 +71,7 @@ class RepositoryGit extends RepositoryBase {
         }
 
         $d1 = json_decode(shell_exec("cd " . escapeShellArg($this->path) . "; git show {$this->branchEsc}:" . escapeShellArg($f)), true);
+        $d1['format'] = 'json';
 
 	if (!$this->isCategory($d1)) {
 	  continue;
@@ -79,6 +80,17 @@ class RepositoryGit extends RepositoryBase {
         $data['categories'][$id] = jsonMultilineStringsJoin($d1, array('exclude' => array(array('const'), array('filter'))));
       }
 
+      if (preg_match("/^([0-9a-zA-Z_\-]+)\.yaml$/", $r, $m)) {
+        $d1 = yaml_parse(shell_exec("cd " . escapeShellArg($this->path) . "; git show {$this->branchEsc}:" . escapeShellArg($f)));
+        $d1['format'] = 'yaml';
+
+	if (!$this->isCategory($d1)) {
+	  continue;
+	}
+
+        $data['categories'][$m[1]] = $d1;
+      }
+
       if (preg_match("/^[0-9]{6} blob [0-9a-f]{40}\t((detailsBody|popupBody)\.html)$/", $r, $m)) {
 	$data['templates'][$m[2]] = shell_exec("cd " . escapeShellArg($this->path) . "; git show {$this->branchEsc}:" . escapeShellArg($m[1]));
       }