diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index e299ef1..5912dbe 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -20,7 +20,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby-version: ['2.6', '2.7', '3.0']
+        ruby-version: ['2.6', '2.7', '3.0', '3.1']
         os: [ubuntu-latest, macos-latest]
 
     steps:
diff --git a/.rubocop.yml b/.rubocop.yml
index ee5bc77..19b7d95 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -10,7 +10,7 @@ AllCops:
     - 'profile/*'
   DisplayCopNames: true
   NewCops: enable
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 2.6
 
 # Preferred codebase style ---------------------------------------------
 
diff --git a/README.md b/README.md
index e4a532e..d1c3b60 100644
--- a/README.md
+++ b/README.md
@@ -117,7 +117,7 @@ Man pages have been added. Checkout `man colorls`.
 
 [(Back to top)](#table-of-contents)
 
-1. Install Ruby (preferably, version >= 2.5)
+1. Install Ruby (preferably, version >= 2.6)
 2. [Download](https://www.nerdfonts.com/font-downloads) and install a Nerd Font. Have a look at the [Nerd Font README](https://github.com/ryanoasis/nerd-fonts/blob/master/readme.md) for installation instructions.
 
     *Note for `iTerm2` users - Please enable the Nerd Font at iTerm2 > Preferences > Profiles > Text > Non-ASCII font > Hack Regular Nerd Font Complete.*
diff --git a/colorls.gemspec b/colorls.gemspec
index 102713f..61384c2 100644
--- a/colorls.gemspec
+++ b/colorls.gemspec
@@ -47,7 +47,7 @@ Gem::Specification.new do |spec|
   spec.homepage      = 'https://github.com/athityakumar/colorls'
   spec.license       = 'MIT'
 
-  spec.required_ruby_version = '>= 2.5.0'
+  spec.required_ruby_version = '>= 2.6.0'
 
   spec.files = IO.popen(
     %w[git ls-files -z], external_encoding: Encoding::ASCII_8BIT
diff --git a/lib/colorls/core.rb b/lib/colorls/core.rb
index aea56d6..0fecb2c 100644
--- a/lib/colorls/core.rb
+++ b/lib/colorls/core.rb
@@ -321,7 +321,7 @@ module ColorLS
     def fetch_string(content, key, color, increment)
       @count[increment] += 1
       value = increment == :folders ? @folders[key] : @files[key]
-      logo  = value.gsub(/\\u[\da-f]{4}/i) { |m| [m[-4..-1].to_i(16)].pack('U') }
+      logo  = value.gsub(/\\u[\da-f]{4}/i) { |m| [m[-4..].to_i(16)].pack('U') }
       name = content.show
       name = make_link(content) if @hyperlink
       name += content.directory? && @indicator_style != 'none' ? '/' : ' '