diff --git a/.github/workflows/rake.yml b/.github/workflows/rake.yml
index 78574132..592e902c 100644
--- a/.github/workflows/rake.yml
+++ b/.github/workflows/rake.yml
@@ -69,7 +69,7 @@ jobs:
         id: cache
         with:
           path: lib/expressir/express/express_parser.*
-          key: v4-${{ runner.os }}-${{ matrix.ruby }}-${{ hashFiles('ext/express-parser/extconf.rb', 'ext/express-parser/antlrgen/**', 'ext/express-parser/express_parser.cpp', '.git/modules/ext/express-parser/antlr4-upstream/HEAD') }}
+          key: v4-${{ matrix.os }}-${{ matrix.ruby }}-${{ hashFiles('ext/express-parser/extconf.rb', 'ext/express-parser/antlrgen/**', 'ext/express-parser/express_parser.cpp', '.git/modules/ext/express-parser/antlr4-upstream/HEAD') }}
 
       - name: Build native extension
         if: steps.cache.outputs.cache-hit != 'true'
diff --git a/expressir.gemspec b/expressir.gemspec
index ab334701..75a78cb0 100644
--- a/expressir.gemspec
+++ b/expressir.gemspec
@@ -30,7 +30,7 @@ Gem::Specification.new do |spec|
 
   spec.extensions = File.join(*%w(ext express-parser extconf.rb))
 
-  spec.add_runtime_dependency "rice", "~> 4.0.3"
+  spec.add_runtime_dependency "rice", "~> 4.1"
   spec.add_runtime_dependency "thor", "~> 1.0"
   spec.add_development_dependency "antlr4-native", "~> 2.1.0"
   spec.add_development_dependency "asciidoctor", "~> 2.0.13"
diff --git a/ext/express-parser/express_parser.cpp b/ext/express-parser/express_parser.cpp
index 6ab66700..37104270 100644
--- a/ext/express-parser/express_parser.cpp
+++ b/ext/express-parser/express_parser.cpp
@@ -18136,7 +18136,7 @@ Object ContextProxy::wrapParseTree(tree::ParseTree* node) {
 
 class ParserProxyExt : public Object {
   public:
-    ParserProxyExt(Object self, string file) {
+    ParserProxyExt(string file) {
       ifstream stream;
       stream.open(file);
       input = new ANTLRInputStream(stream);
@@ -18427,7 +18427,7 @@ void Init_express_parser() {
     .define_method("token_index", &TokenProxy::getTokenIndex);
 
   rb_cParserExt = define_class_under<ParserProxyExt>(rb_mExpressParser, "ParserExt")
-    .define_constructor(Constructor<ParserProxyExt, Object, string>())
+    .define_constructor(Constructor<ParserProxyExt, string>())
     .define_method("syntax", &ParserProxyExt::syntax, Return().keepAlive())
     .define_method("tokens", &ParserProxyExt::getTokens)
     .define_method("visit", &ParserProxyExt::visit, Return().keepAlive());
diff --git a/ext/express-parser/extconf.rb b/ext/express-parser/extconf.rb
index 9dd22a47..301b8df7 100644
--- a/ext/express-parser/extconf.rb
+++ b/ext/express-parser/extconf.rb
@@ -41,8 +41,8 @@
     # workaround for LoadError: 127: The specified procedure could not be found.
     $DLDFLAGS << " -static-libgcc -static-libstdc++"
   when /darwin/
-    $CXXFLAGS << " -mmacosx-version-min=10.14 -fno-c++-static-destructors"
-    $DLDFLAGS << " -mmacosx-version-min=10.14"
+    $CXXFLAGS << " -mmacosx-version-min=10.15 -fno-c++-static-destructors"
+    $DLDFLAGS << " -mmacosx-version-min=10.15"
   end
 else
   require "mkmf-rice"
diff --git a/lib/expressir/version.rb b/lib/expressir/version.rb
index 223bde08..80589c5f 100644
--- a/lib/expressir/version.rb
+++ b/lib/expressir/version.rb
@@ -1,3 +1,3 @@
 module Expressir
-  VERSION = "1.2.10".freeze
+  VERSION = "1.2.11".freeze
 end
diff --git a/rakelib/antlr4-native.rake b/rakelib/antlr4-native.rake
index f84168d2..3139ea27 100644
--- a/rakelib/antlr4-native.rake
+++ b/rakelib/antlr4-native.rake
@@ -48,7 +48,7 @@ def create_pp_class_definition(parser_source_lines)
 
     class ParserProxyExt : public Object {
       public:
-        ParserProxyExt(Object self, string file) {
+        ParserProxyExt(string file) {
           ifstream stream;
           stream.open(file);
           input = new ANTLRInputStream(stream);
@@ -115,7 +115,7 @@ def create_class_api(parser_source_lines)
       .define_method("token_index", &TokenProxy::getTokenIndex);
 
     rb_cParserExt = define_class_under<ParserProxyExt>(rb_mExpressParser, "ParserExt")
-      .define_constructor(Constructor<ParserProxyExt, Object, string>())
+      .define_constructor(Constructor<ParserProxyExt, string>())
       .define_method("syntax", &ParserProxyExt::syntax, Return().keepAlive())
       .define_method("tokens", &ParserProxyExt::getTokens)
       .define_method("visit", &ParserProxyExt::visit, Return().keepAlive());