diff --git a/Gemfile b/Gemfile
index dedab3ca7..a90dd9d27 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,4 +15,4 @@ end
 
 gem "rake"
 gem "test-unit"
-gem "all_images"
+gem "all_images", "~> 0"