diff --git a/Dockerfile b/Dockerfile
index e544c705904f6bb96f5b6182371699b60284f986..2db4fddc0bdc4696ba0df34fc60ae85ab843f70d 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,6 +15,8 @@ RUN apk add --update --no-cache \
         gd \
         imagemagick \
         imagemagick-dev \
+        libpng \
+        libpng-dev \
         python2 \
         libzip-dev \
         icu-dev \