diff --git a/themes/mmotium/layouts/404.html b/themes/mmotium/layouts/404.html
index a087b33..e2aa9c8 100644
--- a/themes/mmotium/layouts/404.html
+++ b/themes/mmotium/layouts/404.html
@@ -1,3 +1,8 @@
+{{ define "head_meta" }}
+    <meta name="description" content="Страница не найдена">
+    <meta property="og:description" content="Страница не найдена">
+{{end}}
+
 {{ define "main" }}
 <div class="single post">
 
diff --git a/themes/mmotium/layouts/_default/single.html b/themes/mmotium/layouts/_default/single.html
index 3b85d24..21d9a5e 100644
--- a/themes/mmotium/layouts/_default/single.html
+++ b/themes/mmotium/layouts/_default/single.html
@@ -2,8 +2,8 @@
     <meta property="og:type" content="article">
     <meta property="og:title" content="{{ .Title }}">
     <meta name="keywords" content="{{ if .IsPage}}{{ range $index, $tag := .Params.tags }}{{ $tag }},{{ end }}{{ else }}{{ range $plural, $terms := .Site.Taxonomies }}{{ range $term, $val := $terms }}{{ printf "%s," $term }}{{ end }}{{ end }}{{ end }}" />
-    <meta name="description" content="{{ with .Description }}{{ . }}{{ else }}{{if .IsPage}}{{ .Summary }}{{ else }}{{ with .Site.Params.description }}{{ . }}{{ end }}{{ end }}{{ end }}">
-    <meta property="og:description" content="{{ with .Description }}{{ . }}{{ else }}{{if .IsPage}}{{ .Summary }}{{ else }}{{ with .Site.Params.description }}{{ . }}{{ end }}{{ end }}{{ end }}">
+    <meta name="description" content="{{ with .Description }}{{ . }}{{ else }}{{if and (.IsPage) (.Summary) }}{{ .Summary }}{{ else }}{{ .Title }}{{ end }}{{ end }}">
+    <meta property="og:description" content="{{ with .Description }}{{ . }}{{ else }}{{if and (.IsPage) (.Summary) }}{{ .Summary }}{{ else }}{{ .Title }}{{ end }}{{ end }}">
     <meta property="og:url" content="{{ .Permalink }}">
     {{ with .PublishDate }}<meta property="article:published_time" {{ .Format "2006-01-02T15:04:05-07:00" | printf "content=%q" | safeHTMLAttr }}>{{ end }}
     {{ with .Lastmod }}<meta property="article:modified_time" {{ .Format "2006-01-02T15:04:05-07:00" | printf "content=%q" | safeHTMLAttr }}>{{ end }}
diff --git a/themes/mmotium/layouts/categories/taxonomy.html b/themes/mmotium/layouts/categories/taxonomy.html
index b57cb1d..321bd08 100644
--- a/themes/mmotium/layouts/categories/taxonomy.html
+++ b/themes/mmotium/layouts/categories/taxonomy.html
@@ -1,3 +1,8 @@
+{{ define "head_meta" }}
+    <meta name="description" content="{{ with .Description }}{{ . }}{{ else }}Категория {{.Title}}{{ end }}">
+    <meta property="og:description" content="{{ with .Description }}{{ . }}{{ else }}Категория {{.Title}}{{ end }}">
+{{end}}
+
 {{ define "main" }}
 <div class="page-wrapper">
     <div class="content-column">