diff --git a/themes/patek/layouts/shortcodes/blogPhoto.html b/themes/patek/layouts/shortcodes/blogPhoto.html
index 58f82ca..f57d60e 100644
--- a/themes/patek/layouts/shortcodes/blogPhoto.html
+++ b/themes/patek/layouts/shortcodes/blogPhoto.html
@@ -11,6 +11,7 @@ where possible named params are:
 * src - path to the image in page bundle
 * alt - textual description of the image, the <img> alt attribute
 * caption (optional) - the caption displayed under the image, defaults to `alt`. Set to false to disable caption rendering
+* format (optional) - the format of the images, defaults to `jpg`, available formats here: https://gohugo.io/content-management/image-processing/#target-format
 
 */ -}}
 {{- $imageName := false -}}
@@ -31,16 +32,29 @@ where possible named params are:
 {{- $sizes := slice (slice 640 360 50) (slice 1280 720 50) (slice 1920 1080 50) -}}
 {{- $srcset := slice -}}
 {{- $largest := false -}}
+
+{{- $format := (.Get "format") -}}
 {{- range $sizes -}}
     {{- if (or (gt $img.Width (index . 0)) (gt $img.Height (index . 1))) -}}
-        {{- $resized := $img.Fit (printf "%dx%d q%d" (index . 0) (index . 1) (index . 2)) -}}
+        {{- $resized := false }}
+        {{- if or (eq $format false) (eq $format "jpg") }}
+            {{- $resized = $img.Fit (printf "%dx%d q%d" (index . 0) (index . 1) (index . 2)) -}}
+        {{- else -}}
+	        {{- $resized = $img.Fit (printf "%dx%d %s" (index . 0) (index . 1) $format) -}}
+        {{- end -}}
+
         {{- $srcset = $srcset | append (printf "%s %dw" $resized.RelPermalink (index . 0)) -}}
         {{- $largest = $resized -}}
     {{- end -}}
 {{- end -}}
 
 {{- if (lt (len $srcset) (len $sizes)) -}}
-    {{- $compressed := $img.Fit (printf "%dx%d q90" $img.Width $img.Height) -}}
+    {{- $compressed := false }}
+    {{- if or (eq $format false) (eq $format "jpg") }}
+        {{- $compressed = $img.Fit (printf "%dx%d q90" $img.Width $img.Height) -}}
+    {{- else -}}
+        {{- $compressed = $img.Fit (printf "%dx%d %s" $img.Width $img.Height $format) -}}
+    {{- end -}}
     {{- $srcset = $srcset | append (printf "%s %dw" $compressed.RelPermalink $compressed.Width) -}}
     {{- $largest = $compressed -}}
 {{- end -}}