diff --git a/themes/hugo-theme-ipng/layouts/shortcodes/image.html b/themes/hugo-theme-ipng/layouts/shortcodes/image.html
index 167c319..06a9523 100644
--- a/themes/hugo-theme-ipng/layouts/shortcodes/image.html
+++ b/themes/hugo-theme-ipng/layouts/shortcodes/image.html
@@ -10,7 +10,7 @@
     {{- end }}
     <img src="{{ .Get "src" | relURL }}"
          {{- if or (.Get "alt") (.Get "caption") }}
-         alt="{{ with .Get "alt" }}{{ . }}{{ else }}{{ .Get "caption" | markdownify| plainify }}{{ end }}"
+         alt="{{ with .Get "alt" }}{{ replace . "'" "&#39;" }}{{ else }}{{ .Get "caption" | markdownify| plainify }}{{ end }}"
          {{- end -}}
     /> <!-- Closing img tag -->
     {{- if .Get "link" }}</a>{{ end -}}