diff --git a/Gemfile b/Gemfile
old mode 100755
new mode 100644
index 348685d..04a2e27
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ ruby '2.5.7'
 gem "sinatra", :require => 'sinatra/base'
 gem "sinatra-activerecord"
 gem "sinatra-contrib", :require => 'sinatra/contrib/all'
-gem "activerecord", "~> 4.2.11.1"
+gem "activerecord", "~> 5.2.8.1"
 gem "mysql2"
 gem "rdiscount" #markdown support
 gem "yard-sinatra", :require => false # document generation
diff --git a/Gemfile.lock b/Gemfile.lock
index 7e95396..7f04d3b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,23 +1,21 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activemodel (4.2.11.1)
-      activesupport (= 4.2.11.1)
-      builder (~> 3.1)
-    activerecord (4.2.11.1)
-      activemodel (= 4.2.11.1)
-      activesupport (= 4.2.11.1)
-      arel (~> 6.0)
-    activesupport (4.2.11.1)
-      i18n (~> 0.7)
+    activemodel (5.2.8.1)
+      activesupport (= 5.2.8.1)
+    activerecord (5.2.8.1)
+      activemodel (= 5.2.8.1)
+      activesupport (= 5.2.8.1)
+      arel (>= 9.0)
+    activesupport (5.2.8.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    arel (6.0.4)
+    arel (9.0.0)
     backports (3.15.0)
-    builder (3.2.3)
-    concurrent-ruby (1.1.5)
-    i18n (0.9.5)
+    concurrent-ruby (1.1.10)
+    i18n (1.11.0)
       concurrent-ruby (~> 1.0)
     minitest (5.13.0)
     multi_json (1.14.1)
@@ -47,7 +45,7 @@ GEM
     sqlite3 (1.3.10)
     thread_safe (0.3.6)
     tilt (2.0.10)
-    tzinfo (1.2.5)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     yard (0.9.20)
     yard-sinatra (1.0.0)
@@ -57,7 +55,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  activerecord (~> 4.2.11.1)
+  activerecord (~> 5.2.8.1)
   minitest
   mysql2
   rack-test