diff --git a/Gemfile b/Gemfile
index 51e1abc..5d7b098 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,4 +13,4 @@ gem "sinatra", "~> 3.1"
 
 gem "cowsay", "~> 0.3.0"
 
-gem "base64", "~> 0.2.0"
+gem "base64", "~> 0.3.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index 47ab880..6ba7ef3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    base64 (0.2.0)
+    base64 (0.3.0)
     cowsay (0.3.0)
     mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
@@ -24,7 +24,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  base64 (~> 0.2.0)
+  base64 (~> 0.3.0)
   cowsay (~> 0.3.0)
   puma (~> 6.4)
   sinatra (~> 3.1)