diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 0000000..63d1618
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1 @@
+custom: paypal.me/miasteinkirch
diff --git a/Gemfile.lock b/Gemfile.lock
index 90b2ed4..c3243f0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,6 +24,7 @@ GEM
       ruby_core_source (>= 0.1.4)
     multi_json (1.0.4)
     nyan-cat-formatter (0.0.5)
+    racc (1.7.3)
     rdoc (3.12)
       json (~> 1.4)
     rspec (2.7.0)
@@ -44,12 +45,13 @@ GEM
       ruby-debug-base19 (>= 0.11.19)
     ruby_core_source (0.1.5)
       archive-tar-minitar (>= 0.5.2)
-    ruby_parser (2.3.1)
-      sexp_processor (~> 3.0)
+    ruby_parser (3.21.0)
+      racc (~> 1.5)
+      sexp_processor (~> 4.16)
     rubyless (0.8.6)
       ruby_parser (>= 2.0.4)
       sexp_processor (>= 3.0.1)
-    sexp_processor (3.0.10)
+    sexp_processor (4.17.1)
     tzinfo (0.3.31)
 
 PLATFORMS