diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 460e1e1..3aae9e9 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,7 +8,7 @@ jobs:
     uses: ruby/actions/.github/workflows/ruby_versions.yml@master
     with:
       engine: cruby-truffleruby
-      min_version: 2.6
+      min_version: 2.7
 
   build:
     needs: ruby-versions
diff --git a/etc.gemspec b/etc.gemspec
index 3facc74..0e9803d 100644
--- a/etc.gemspec
+++ b/etc.gemspec
@@ -40,5 +40,5 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
   spec.extensions    = %w{ext/etc/extconf.rb}
 
-  spec.required_ruby_version = ">= 2.6.0"
+  spec.required_ruby_version = ">= 2.7.0"
 end
diff --git a/ext/etc/etc.c b/ext/etc/etc.c
index 66ef8fc..8d50a96 100644
--- a/ext/etc/etc.c
+++ b/ext/etc/etc.c
@@ -832,11 +832,7 @@ etc_uname(VALUE obj)
 			 rb_w32_conv_from_wchar(v.szCSDVersion, rb_utf8_encoding()));
     rb_hash_aset(result, SYMBOL_LIT("version"), version);
 
-# if defined _MSC_VER && _MSC_VER < 1300
-#   define GET_COMPUTER_NAME(ptr, plen) GetComputerNameW(ptr, plen)
-# else
 #   define GET_COMPUTER_NAME(ptr, plen) GetComputerNameExW(ComputerNameDnsFullyQualified, ptr, plen)
-# endif
     GET_COMPUTER_NAME(NULL, &len);
     buf = ALLOCV_N(WCHAR, vbuf, len);
     if (GET_COMPUTER_NAME(buf, &len)) {