diff --git a/.travis.yml b/.travis.yml
index bd2e1eb..be08722 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ rvm:
   - 2.7
 script: bundle exec rake
 env:
-  - RAILS_VERSION=6.0.3.1
+  - RAILS_VERSION=6.0.3.5
   - RAILS_VERSION=5.2.0
 services:
   - mysql
diff --git a/Gemfile b/Gemfile
index 5e12aeb..152273a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source "https://rubygems.org"
 gemspec
 
-DEFAULT_RAILS_VERSION = '6.0.3'
+DEFAULT_RAILS_VERSION = '6.0.3.5'
 ENV['RAILS_VERSION'] ||= DEFAULT_RAILS_VERSION
 
 if ENV['RAILS_VERSION'] == '4.2.10'
diff --git a/README.md b/README.md
index 9cb788f..4752e90 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,8 @@ pp kv.mdel(["foo", "bar"])
 # nil
 ```
 
+Note that due to MySQL's default collation, KV keys are case-insensitive.
+
 ### GitHub::SQL
 
 ```ruby
diff --git a/lib/github/ds/version.rb b/lib/github/ds/version.rb
index 32aa81f..9e9dd8c 100644
--- a/lib/github/ds/version.rb
+++ b/lib/github/ds/version.rb
@@ -1,5 +1,5 @@
 module GitHub
   module DS
-    VERSION = "0.5.0"
+    VERSION = "0.5.1"
   end
 end
diff --git a/lib/github/kv.rb b/lib/github/kv.rb
index 9777a9a..20ff5f6 100644
--- a/lib/github/kv.rb
+++ b/lib/github/kv.rb
@@ -129,7 +129,8 @@ def mget(keys)
           SELECT `key`, value FROM #{@table_name} WHERE `key` IN :keys AND (`expires_at` IS NULL OR `expires_at` > :now)
         SQL
 
-        keys.map { |key| kvs[key] }
+        kvs.keys.each { |key| kvs[key.downcase] = kvs[key] }
+        keys.map { |key| kvs[key.downcase] }
       }
     end
 
diff --git a/test/github/kv_test.rb b/test/github/kv_test.rb
index 2be27ad..cf5d661 100644
--- a/test/github/kv_test.rb
+++ b/test/github/kv_test.rb
@@ -61,6 +61,18 @@ def test_mget_and_mset
     assert_equal ["2", "1"], @kv.mget(["b", "a"]).value!
   end
 
+  def test_get_and_set_case_insensitive
+    assert_nil @kv.get("foo").value!
+
+    @kv.set "foo", "lowercase"
+    assert_equal "lowercase", @kv.get("foo").value!
+    assert_equal "lowercase", @kv.get("FOO").value!
+
+    @kv.set "FOO", "uppercase"
+    assert_equal "uppercase", @kv.get("foo").value!
+    assert_equal "uppercase", @kv.get("FOO").value!
+  end
+
   def test_get_failure
     ActiveRecord::Base.connection.stubs(:select_all).raises(Errno::ECONNRESET)
 
diff --git a/test/github/sql_test.rb b/test/github/sql_test.rb
index 12e72a7..2d0479e 100644
--- a/test/github/sql_test.rb
+++ b/test/github/sql_test.rb
@@ -11,8 +11,8 @@ class GitHub::SQLTest < Minitest::Test
       [DateTime.now.utc,     "'1970-01-01 00:00:00'"],
       [Time.now.utc,         "'1970-01-01 00:00:00'"],
       [Time.now.utc.to_date, "'1970-01-01'"],
-      [true,                 "1", {"5.2.0" => "TRUE", "6.0.3.1" => "TRUE"}],
-      [false,                "0", {"5.2.0" => "FALSE", "6.0.3.1" => "FALSE"}],
+      [true,                 "1", {"5.2.0" => "TRUE", "6.0.3.5" => "TRUE"}],
+      [false,                "0", {"5.2.0" => "FALSE", "6.0.3.5" => "FALSE"}],
       [17,                   "17"],
       [1.7,                  "1.7"],
       ["corge",              "'corge'"],