diff --git a/.travis.yml b/.travis.yml
index 6f21b41a..a95c3efd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,12 @@
 before_install:
   - gem update bundler
+  - gem update rake
 
 rvm:
-  - 2.0.0
-  - 2.1.10
-  - 2.2.9
-  - 2.3.6
-  - 2.4.3
-  - 2.5.0
+  - 2.4.9
+  - 2.5.7
+  - 2.6.5
+  - 2.7.0
 
 script:
   - bundle exec rake spec
diff --git a/lib/pry-doc/pry_ext/method_info.rb b/lib/pry-doc/pry_ext/method_info.rb
index 22f5d586..72817692 100644
--- a/lib/pry-doc/pry_ext/method_info.rb
+++ b/lib/pry-doc/pry_ext/method_info.rb
@@ -115,7 +115,7 @@ def find_gem_dir(meth)
           host_source_location, _ =  WrappedModule.new(host).source_location
           break if host_source_location != nil
           return unless host.name
-          host = eval(host.namespace_name)
+          host = eval(namespace_name(host))
         end while host
 
         # We want to exclude all source_locations that aren't gems (i.e
@@ -186,6 +186,12 @@ def cache(meth)
           YARD.parse(file)
         end
       end
+
+      private
+
+      def namespace_name(host)
+        host.name.split("::")[0..-2].join("::")
+      end
     end
   end
 end
diff --git a/pry-doc.gemspec b/pry-doc.gemspec
index 6ddac3ad..aea791a1 100644
--- a/pry-doc.gemspec
+++ b/pry-doc.gemspec
@@ -26,5 +26,5 @@ DESCR
   s.add_dependency 'pry', "~> 0.11"
   s.add_development_dependency 'latest_ruby', '~> 2.0'
   s.add_development_dependency 'rspec', '~> 3.5'
-  s.add_development_dependency 'rake', "~> 10.0"
+  s.add_development_dependency 'rake'
 end