diff --git a/.circleci/config.yml b/.circleci/config.yml
index d6d007367a..6a892d91b3 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -7,7 +7,7 @@ commands:
       - checkout
 
       # Install bundler
-      - run: gem install bundler:2.1.4
+      - run: gem install bundler:2.3.5
 
       # Restore Cached Dependencies
       - restore_cache:
diff --git a/Gemfile.lock b/Gemfile.lock
index 99616454ce..487e8dac6b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -357,4 +357,4 @@ DEPENDENCIES
   yard
 
 BUNDLED WITH
-   2.2.24
+   2.3.5