Rakefile in mapfish-1.3.0 vs Rakefile in mapfish-1.3.1

@@ -29,10 +29,10 @@
     gemspec.description = "MapFish is a flexible and complete framework for building rich web-mapping applications. Homepage: mapfish.org"
     gemspec.email = "[e-mail]"
     gemspec.homepage = "http://mapfish.org/doc/implementations/rails.html"
     gemspec.authors = ["Pirmin Kalberer"]
     gemspec.add_dependency("spatial_adapter")
-    gemspec.add_dependency("POpen4", ">= 0.1.5")
+    gemspec.add_dependency("POpen4", ">= 0.1.4")
   end
   Jeweler::GemcutterTasks.new
 rescue LoadError
   puts "Jeweler not available. Install it with: gem install jeweler"
 end