diff --git a/.rubocop.yml b/.rubocop.yml
index 1eaa9d12..07d14f70 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,5 +1,5 @@
 AllCops:
-  TargetRubyVersion: 1.9.3
+  TargetRubyVersion: 2.5.0
   # Turns off the default Rubocop rules.
   DisabledByDefault: true
   Exclude:
diff --git a/.travis.yml b/.travis.yml
index a04ac8f1..8c0e4de8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,8 +2,6 @@
 language: ruby
 
 rvm:
-- 2.3.0
-- 2.4.1
 - 2.5.0
 - 2.6.0
 
diff --git a/blob/azure-storage-blob.gemspec b/blob/azure-storage-blob.gemspec
index bc45e525..29f37dee 100644
--- a/blob/azure-storage-blob.gemspec
+++ b/blob/azure-storage-blob.gemspec
@@ -38,7 +38,7 @@ Gem::Specification.new do |s|
   s.license     = "MIT"
   s.files       = `git ls-files ./lib/azure/storage/blob/`.split("\n") << "./lib/azure/storage/blob.rb"
 
-  s.required_ruby_version = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.5.0"
 
   s.add_runtime_dependency("azure-storage-common",    "~> 2.0")
   s.add_runtime_dependency("nokogiri",                "~> 1", ">= 1.10.8")
diff --git a/common/azure-storage-common.gemspec b/common/azure-storage-common.gemspec
index 2a614e58..4cd1e602 100644
--- a/common/azure-storage-common.gemspec
+++ b/common/azure-storage-common.gemspec
@@ -39,7 +39,7 @@ Gem::Specification.new do |s|
   s.files       = `git ls-files ./lib/azure/storage/common/`.split("\n") << "./lib/azure/storage/common.rb"
   s.files       += `git ls-files ./lib/azure/core/`.split("\n") << "./lib/azure/core.rb" << "./lib/azure/http_response_helper.rb"
 
-  s.required_ruby_version = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.5.0"
 
   s.add_runtime_dependency('faraday',                 '~> 1.0')
   s.add_runtime_dependency('faraday_middleware',      "~> 1.0", ">= 1.0.0.rc1")
diff --git a/file/azure-storage-file.gemspec b/file/azure-storage-file.gemspec
index 6f5f7393..448886f4 100644
--- a/file/azure-storage-file.gemspec
+++ b/file/azure-storage-file.gemspec
@@ -38,7 +38,7 @@ Gem::Specification.new do |s|
   s.license     = "MIT"
   s.files       = `git ls-files ./lib/azure/storage/file`.split("\n") << "./lib/azure/storage/file.rb"
 
-  s.required_ruby_version = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.5.0"
 
   s.add_runtime_dependency("azure-storage-common",    "~> 2.0")
   s.add_runtime_dependency("nokogiri",                "~> 1", ">= 1.10.8")
diff --git a/queue/azure-storage-queue.gemspec b/queue/azure-storage-queue.gemspec
index 1295bd30..0b4f6e4c 100644
--- a/queue/azure-storage-queue.gemspec
+++ b/queue/azure-storage-queue.gemspec
@@ -38,7 +38,7 @@ Gem::Specification.new do |s|
   s.license     = "MIT"
   s.files       = `git ls-files ./lib/azure/storage/queue/`.split("\n") << "./lib/azure/storage/queue.rb"
 
-  s.required_ruby_version = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.5.0"
 
   s.add_runtime_dependency("azure-storage-common",    "~> 2.0")
   s.add_runtime_dependency("nokogiri",                "~> 1", ">= 1.10.8")
diff --git a/table/azure-storage-table.gemspec b/table/azure-storage-table.gemspec
index 1c78ea4f..e5a4815e 100644
--- a/table/azure-storage-table.gemspec
+++ b/table/azure-storage-table.gemspec
@@ -38,7 +38,7 @@ Gem::Specification.new do |s|
   s.license     = "MIT"
   s.files       = `git ls-files ./lib/azure/storage/table/`.split("\n") << "./lib/azure/storage/table.rb"
 
-  s.required_ruby_version = ">= 2.3.0"
+  s.required_ruby_version = ">= 2.5.0"
 
   s.add_runtime_dependency("azure-storage-common",    "~> 2.0")
   s.add_runtime_dependency("nokogiri",                "~> 1", ">= 1.10.8")