diff --git a/.travis.yml b/.travis.yml
index 32a00d2a..0be94a5a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,3 @@
-sudo: required
-
 services:
   - docker
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 0787c806..751031d9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GEM
     mocha (0.14.0)
       metaclass (~> 0.0.1)
     rake (10.3.2)
-    rake-compiler (0.9.3)
+    rake-compiler (1.0.8)
       rake
 
 PLATFORMS
@@ -20,7 +20,7 @@ PLATFORMS
 DEPENDENCIES
   minitest (~> 5.0)
   mocha (~> 0.14)
-  rake-compiler (~> 0.9)
+  rake-compiler (~> 1.0)
   stackprof!
 
 BUNDLED WITH
diff --git a/README.md b/README.md
index e9564850..0cb2fd9a 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # Stackprof
 
+[![Build Status](https://travis-ci.org/tmm1/stackprof.svg?branch=master)](https://travis-ci.org/tmm1/stackprof)
+[![Gem Version](https://badge.fury.io/rb/stackprof.svg)](https://badge.fury.io/rb/stackprof)
+
 A sampling call-stack profiler for Ruby.
 
 Inspired heavily by [gperftools](https://code.google.com/p/gperftools/), and written as a replacement for [perftools.rb](https://github.com/tmm1/perftools.rb).
@@ -95,7 +98,7 @@ $ stackprof --flamegraph-viewer=tmp/flamegraph
 
 The `--flamegraph-viewer` command will output the exact shell command you need to run to open the `tmp/flamegraph` you generated with the built in stackprof flamegraph viewer:
 
-![](http://i.imgur.com/EwndrgD.png)
+![](https://i.imgur.com/EwndrgD.png)
 
 Alternatively, you can generate a flamegraph that uses [d3-flame-graph](https://github.com/spiermar/d3-flame-graph):
 
@@ -211,7 +214,7 @@ multiple reporting modes are supported:
 
 ### `StackProf::Report.new(data).print_graphviz`
 
-![](http://cl.ly/image/2t3l2q0l0B0A/content)
+![](https://cl.ly/image/2t3l2q0l0B0A/content)
 
 ```
 digraph profile {
diff --git a/stackprof.gemspec b/stackprof.gemspec
index 08c3224f..16db9f12 100644
--- a/stackprof.gemspec
+++ b/stackprof.gemspec
@@ -1,7 +1,7 @@
 Gem::Specification.new do |s|
   s.name = 'stackprof'
   s.version = '0.2.13'
-  s.homepage = 'http://github.com/tmm1/stackprof'
+  s.homepage = 'https://github.com/tmm1/stackprof'
 
   s.authors = 'Aman Gupta'
   s.email   = 'aman@tmm1.net'
@@ -19,7 +19,9 @@ Gem::Specification.new do |s|
 
   s.license = 'MIT'
 
-  s.add_development_dependency 'rake-compiler', '~> 0.9'
+  s.required_ruby_version = '>= 2.1.0'
+
+  s.add_development_dependency 'rake-compiler', '~> 1.0'
   s.add_development_dependency 'mocha', '~> 0.14'
   s.add_development_dependency 'minitest', '~> 5.0'
 end