diff --git a/Gemfile b/Gemfile
index 6e03cf6..7615d67 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,5 +2,9 @@
 
 source "https://rubygems.org"
 
+# FIXME: Workaround for Ruby 4.0+
+# https://github.com/banister/binding_of_caller/pull/90
+gem "binding_of_caller", github: "kivikakk/binding_of_caller", branch: "push-yrnnzolypxun"
+
 # Specify your gem's dependencies in ruby_header_parser.gemspec
 gemspec
diff --git a/config/default.yml.erb b/config/default.yml.erb
index 1c395b5..0da63ae 100644
--- a/config/default.yml.erb
+++ b/config/default.yml.erb
@@ -150,6 +150,8 @@ function:
       10: ref_array
     rb_set_end_proc:
       1: function
+    rb_set_foreach:
+      2: function
     rb_st_insert2:
       4: function
     rb_thread_call_with_gvl: