diff --git a/.circleci/config.yml b/.circleci/config.yml
index d257546..90d8cf5 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -65,14 +65,14 @@ workflows:
       - test:
           matrix:
             parameters:
-              version: ["3.1.6", "3.2.6", "3.3.6", "3.4.1"]
+              version: ["3.2.6", "3.3.6", "3.4.1"]
   cron-workflow:
     jobs:
       - rubocop
       - test:
           matrix:
             parameters:
-              version: ["3.1.6", "3.2.6", "3.3.6", "3.4.1"]
+              version: ["3.2.6", "3.3.6", "3.4.1"]
     triggers:
       - schedule:
           cron: "0 13 * * 6"