diff --git a/Gemfile b/Gemfile
index b5881c4a2..509316c1a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,6 +7,8 @@ end
 
 gemspec
 
+gem "base64"
+
 group :benchmark, :test do
   gem 'benchmark-ips'
   gem 'memory_profiler'
diff --git a/Gemfile.lock b/Gemfile.lock
index 66ff47345..cbfda8d4d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,6 +15,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    base64 (0.2.0)
     benchmark-ips (2.13.0)
     json (2.7.2)
     language_server-protocol (3.17.0.3)
@@ -57,6 +58,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  base64
   benchmark-ips
   liquid!
   liquid-c!