diff --git a/Gemfile.lock b/Gemfile.lock
index 7ba272e5..3aaf2af9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     departure (6.6.0)
       activerecord (>= 6.0.0, < 7.2.0, != 7.0.0)
-      mysql2 (>= 0.4.0, <= 0.5.5)
+      mysql2 (>= 0.4.0, < 0.6.0)
       railties (>= 6.0.0, < 7.2.0, != 7.0.0)
 
 GEM
@@ -77,7 +77,7 @@ GEM
     method_source (1.0.0)
     minitest (5.22.2)
     mutex_m (0.2.0)
-    mysql2 (0.5.5)
+    mysql2 (0.5.6)
     nokogiri (1.16.2-arm64-darwin)
       racc (~> 1.4)
     nokogiri (1.16.2-x86_64-linux)
diff --git a/departure.gemspec b/departure.gemspec
index 3459e4f3..68bea56a 100644
--- a/departure.gemspec
+++ b/departure.gemspec
@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
 
   spec.add_runtime_dependency 'railties', '>= 6.0.0', '!= 7.0.0', '< 7.2.0'
   spec.add_runtime_dependency 'activerecord', '>= 6.0.0', '!= 7.0.0', '< 7.2.0'
-  spec.add_runtime_dependency 'mysql2', '>= 0.4.0', '<= 0.5.5'
+  spec.add_runtime_dependency 'mysql2', '>= 0.4.0', '< 0.6.0'
 
   spec.add_development_dependency 'appraisal', '~> 2.4.1'
   spec.add_development_dependency 'rake', '>= 10.0'
diff --git a/gemfiles/rails_6_0.gemfile.lock b/gemfiles/rails_6_0.gemfile.lock
index 0975df2f..53093dbf 100644
--- a/gemfiles/rails_6_0.gemfile.lock
+++ b/gemfiles/rails_6_0.gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     departure (6.6.0)
       activerecord (>= 6.0.0, < 7.2.0, != 7.0.0)
-      mysql2 (>= 0.4.0, <= 0.5.5)
+      mysql2 (>= 0.4.0, < 0.6.0)
       railties (>= 6.0.0, < 7.2.0, != 7.0.0)
 
 GEM
@@ -100,7 +100,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.5)
     minitest (5.22.2)
-    mysql2 (0.5.5)
+    mysql2 (0.5.6)
     net-imap (0.4.10)
       date
       net-protocol
diff --git a/gemfiles/rails_6_1.gemfile.lock b/gemfiles/rails_6_1.gemfile.lock
index 77ab18a2..8b9cf9ea 100644
--- a/gemfiles/rails_6_1.gemfile.lock
+++ b/gemfiles/rails_6_1.gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     departure (6.6.0)
       activerecord (>= 6.0.0, < 7.2.0, != 7.0.0)
-      mysql2 (>= 0.4.0, <= 0.5.5)
+      mysql2 (>= 0.4.0, < 0.6.0)
       railties (>= 6.0.0, < 7.2.0, != 7.0.0)
 
 GEM
@@ -104,7 +104,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.5)
     minitest (5.22.2)
-    mysql2 (0.5.5)
+    mysql2 (0.5.6)
     net-imap (0.4.10)
       date
       net-protocol
diff --git a/gemfiles/rails_7_0.gemfile.lock b/gemfiles/rails_7_0.gemfile.lock
index f2dbe78e..cb3f95b9 100644
--- a/gemfiles/rails_7_0.gemfile.lock
+++ b/gemfiles/rails_7_0.gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     departure (6.6.0)
       activerecord (>= 6.0.0, < 7.2.0, != 7.0.0)
-      mysql2 (>= 0.4.0, <= 0.5.5)
+      mysql2 (>= 0.4.0, < 0.6.0)
       railties (>= 6.0.0, < 7.2.0, != 7.0.0)
 
 GEM
@@ -110,7 +110,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.5)
     minitest (5.22.2)
-    mysql2 (0.5.5)
+    mysql2 (0.5.6)
     net-imap (0.4.10)
       date
       net-protocol
diff --git a/gemfiles/rails_7_1.gemfile.lock b/gemfiles/rails_7_1.gemfile.lock
index bb77822b..24528b1c 100644
--- a/gemfiles/rails_7_1.gemfile.lock
+++ b/gemfiles/rails_7_1.gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     departure (6.6.0)
       activerecord (>= 6.0.0, < 7.2.0, != 7.0.0)
-      mysql2 (>= 0.4.0, <= 0.5.5)
+      mysql2 (>= 0.4.0, < 0.6.0)
       railties (>= 6.0.0, < 7.2.0, != 7.0.0)
 
 GEM
@@ -129,7 +129,7 @@ GEM
     mini_mime (1.1.5)
     minitest (5.22.2)
     mutex_m (0.2.0)
-    mysql2 (0.5.5)
+    mysql2 (0.5.6)
     net-imap (0.4.10)
       date
       net-protocol
diff --git a/gemfiles/ruby_2.7_rails_6_0.gemfile.lock b/gemfiles/ruby_2.7_rails_6_0.gemfile.lock
index 5703a63c..3fd5738d 100644
--- a/gemfiles/ruby_2.7_rails_6_0.gemfile.lock
+++ b/gemfiles/ruby_2.7_rails_6_0.gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     departure (6.6.0)
       activerecord (>= 6.0.0, < 7.2.0, != 7.0.0)
-      mysql2 (>= 0.4.0, <= 0.5.5)
+      mysql2 (>= 0.4.0, < 0.6.0)
       railties (>= 6.0.0, < 7.2.0, != 7.0.0)
 
 GEM
@@ -100,7 +100,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.5)
     minitest (5.22.2)
-    mysql2 (0.5.5)
+    mysql2 (0.5.6)
     net-imap (0.4.10)
       date
       net-protocol
diff --git a/gemfiles/ruby_2.7_rails_6_1.gemfile.lock b/gemfiles/ruby_2.7_rails_6_1.gemfile.lock
index 54888feb..c6e1bf5f 100644
--- a/gemfiles/ruby_2.7_rails_6_1.gemfile.lock
+++ b/gemfiles/ruby_2.7_rails_6_1.gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     departure (6.6.0)
       activerecord (>= 6.0.0, < 7.2.0, != 7.0.0)
-      mysql2 (>= 0.4.0, <= 0.5.5)
+      mysql2 (>= 0.4.0, < 0.6.0)
       railties (>= 6.0.0, < 7.2.0, != 7.0.0)
 
 GEM
@@ -104,7 +104,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.5)
     minitest (5.22.2)
-    mysql2 (0.5.5)
+    mysql2 (0.5.6)
     net-imap (0.4.10)
       date
       net-protocol
diff --git a/gemfiles/ruby_2.7_rails_7_0.gemfile.lock b/gemfiles/ruby_2.7_rails_7_0.gemfile.lock
index ed6d6842..7a39ac40 100644
--- a/gemfiles/ruby_2.7_rails_7_0.gemfile.lock
+++ b/gemfiles/ruby_2.7_rails_7_0.gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     departure (6.6.0)
       activerecord (>= 6.0.0, < 7.2.0, != 7.0.0)
-      mysql2 (>= 0.4.0, <= 0.5.5)
+      mysql2 (>= 0.4.0, < 0.6.0)
       railties (>= 6.0.0, < 7.2.0, != 7.0.0)
 
 GEM
@@ -110,7 +110,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.5)
     minitest (5.22.2)
-    mysql2 (0.5.5)
+    mysql2 (0.5.6)
     net-imap (0.4.10)
       date
       net-protocol
diff --git a/gemfiles/ruby_2.7_rails_7_1.gemfile.lock b/gemfiles/ruby_2.7_rails_7_1.gemfile.lock
index e9117cde..75242710 100644
--- a/gemfiles/ruby_2.7_rails_7_1.gemfile.lock
+++ b/gemfiles/ruby_2.7_rails_7_1.gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     departure (6.6.0)
       activerecord (>= 6.0.0, < 7.2.0, != 7.0.0)
-      mysql2 (>= 0.4.0, <= 0.5.5)
+      mysql2 (>= 0.4.0, < 0.6.0)
       railties (>= 6.0.0, < 7.2.0, != 7.0.0)
 
 GEM
@@ -129,7 +129,7 @@ GEM
     mini_mime (1.1.5)
     minitest (5.22.2)
     mutex_m (0.2.0)
-    mysql2 (0.5.5)
+    mysql2 (0.5.6)
     net-imap (0.4.10)
       date
       net-protocol