diff --git a/.mvn/extensions.xml b/.mvn/extensions.xml
index a02a5a5..31d6a14 100644
--- a/.mvn/extensions.xml
+++ b/.mvn/extensions.xml
@@ -8,6 +8,6 @@
   <extension>
     <groupId>io.takari.polyglot</groupId>
     <artifactId>polyglot-ruby</artifactId>
-    <version>0.4.8</version>
+    <version>0.7.0</version>
   </extension>
 </extensions>
diff --git a/appveyor.yml b/appveyor.yml
index 86db328..0dc7e22 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,5 @@
 install:
-  - set PATH=C:\jruby-9.0.0.0\bin;%PATH%
+  - set PATH=C:\jruby-9.4.7.0\bin;%PATH%
   - bundle
 build: off
 shallow_clone: true
diff --git a/ruby-maven.gemspec b/ruby-maven.gemspec
index 7924451..0de0902 100644
--- a/ruby-maven.gemspec
+++ b/ruby-maven.gemspec
@@ -21,9 +21,9 @@ Gem::Specification.new do |s|
 
   s.rdoc_options = ["--main", "README.md"]
 
-  s.add_dependency 'ruby-maven-libs', "~> 3.3.9"
-  s.add_development_dependency 'minitest', '~> 5.3'
-  s.add_development_dependency 'rake', '~> 12.3'
+  s.add_dependency 'ruby-maven-libs', "~> 3"
+  s.add_development_dependency 'minitest', '~> 5'
+  s.add_development_dependency 'rake', '~> 13'
 end
 
 # vim: syntax=Ruby
diff --git a/spec/ruby_maven_spec.rb b/spec/ruby_maven_spec.rb
index c33447f..ea48b0d 100644
--- a/spec/ruby_maven_spec.rb
+++ b/spec/ruby_maven_spec.rb
@@ -10,7 +10,7 @@
       _, err = capture_io do
         RubyMaven.exec( '--version' )
       end
-      _(err).must_match /Polyglot Maven Extension 0.4.8/
+      _(err).must_match /Polyglot Maven Extension 0.7.0/
       xml = File.read('.mvn/extensions.xml')
       _(xml).must_equal "dummy\n"
     end
@@ -26,7 +26,7 @@
     FileUtils.rm_f gem_name
       out, _ = capture_subprocess_io do
       # need newer jruby version
-      RubyMaven.exec( '-Dverbose', 'package', '-Djruby.version=9.3.0.0' )
+      RubyMaven.exec( '-Dverbose', 'package', '-Djruby.version=9.4.7.0' )
     end
     _(out).must_match /mvn -Dverbose package/
     _(File.exists?( gem_name )).must_equal true