diff --git a/.circleci/config.yml b/.circleci/config.yml
index d6d007367ae45fcc247193a999ef7459a8a1141f..6a892d91b38d894f7267e7ab8bd5251c95c23037 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 99616454ce404d20d4cad32d68818a4685c2892a..487e8dac6b202d04c43e5713420c964e914e0358 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -357,4 +357,4 @@ DEPENDENCIES
   yard
 
 BUNDLED WITH
-   2.2.24
+   2.3.5