diff --git a/publify_core.gemspec b/publify_core.gemspec
index 3ffbb44e..eadcad2b 100644
--- a/publify_core.gemspec
+++ b/publify_core.gemspec
@@ -34,7 +34,7 @@ Gem::Specification.new do |s|
   s.add_dependency "jquery-ui-rails", ">= 7", "< 9"
   s.add_dependency "kaminari", ["~> 1.2", ">= 1.2.1"]
   s.add_dependency "marcel", ">= 1.0", "< 1.3"
-  s.add_dependency "mini_magick", ["~> 4.9", ">= 4.9.4"]
+  s.add_dependency "mini_magick", ">= 4.9.4", "< 6.0"
   # Force minimum nokogiri version to avoid security issues
   s.add_dependency "nokogiri", ">= 1.12.5"
   s.add_dependency "rack", ">= 2.2.3"