diff --git a/CMakeLists.txt b/CMakeLists.txt
index 63f9a95..00c32b9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required (VERSION 3.2)
 project(libravatarserv
-        VERSION 0.7.0
+        VERSION 0.7.1
         LANGUAGES CXX
 )
 
diff --git a/src/libravatarserv.cpp b/src/libravatarserv.cpp
index 332b017..8d6d0e5 100644
--- a/src/libravatarserv.cpp
+++ b/src/libravatarserv.cpp
@@ -125,6 +125,7 @@ int main()
                             });
                 Magick::Image img;
                 img = identicon.generate(avatar.digest, avatar.size);
+                img.magick("PNG");
                 image::Image image({ 0, img });
                 image::write(image);
             }