diff --git a/geo/mapforge/patches/patch-Gemfile b/geo/mapforge/patches/patch-Gemfile
new file mode 100644
index 0000000..999f7d7
--- /dev/null
+++ b/geo/mapforge/patches/patch-Gemfile
@@ -0,0 +1,10 @@
+Index: Gemfile
+--- Gemfile.orig
++++ Gemfile
+@@ -1,5 +1,5 @@
+ source "https://rubygems.org"
+-ruby "4.0.0"
++ruby ">= 4.0.0"
+ 
+ gem "rails"
+