diff --git a/google_drive/Gemfile.lock b/google_drive/Gemfile.lock
index 2ecd94a..07a8ecf 100644
--- a/google_drive/Gemfile.lock
+++ b/google_drive/Gemfile.lock
@@ -1,17 +1,17 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.2.5.1)
-      i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
+    activesupport (5.2.8)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
     addressable (2.4.0)
     autoparse (0.3.3)
       addressable (>= 2.3.1)
       extlib (>= 0.9.15)
       multi_json (>= 1.0.0)
+    concurrent-ruby (1.1.10)
     extlib (0.9.16)
     faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
@@ -25,12 +25,12 @@ GEM
       multi_json (~> 1.10)
       retriable (~> 1.4)
       signet (~> 0.6)
-    i18n (0.7.0)
-    json (1.8.3)
+    i18n (1.10.0)
+      concurrent-ruby (~> 1.0)
     jwt (1.5.2)
     launchy (2.4.3)
       addressable (~> 2.3)
-    minitest (5.8.4)
+    minitest (5.15.0)
     multi_json (1.11.2)
     multipart-post (2.0.0)
     parseconfig (1.0.8)
@@ -40,8 +40,8 @@ GEM
       faraday (~> 0.9)
       jwt (~> 1.5)
       multi_json (~> 1.10)
-    thread_safe (0.3.5)
-    tzinfo (1.2.2)
+    thread_safe (0.3.6)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
 
 PLATFORMS