diff --git a/.circleci/config.yml b/.circleci/config.yml
index 9222d37..74ae3d3 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ version: 2.1
 jobs:
   test:
     docker:
-      - image: circleci/ruby:2.7.1
+      - image: circleci/ruby:2.7.4
         auth:
           username: $DOCKERHUB_USERNAME
           password: $DOCKERHUB_TOKEN
@@ -31,7 +31,7 @@ jobs:
               --out ~/rspec/rspec.xml
   push_to_rubygems:
     docker:
-      - image: circleci/ruby:2.7.1
+      - image: circleci/ruby:2.7.4
         auth:
           username: $DOCKERHUB_USERNAME
           password: $DOCKERHUB_TOKEN
diff --git a/.ruby-version b/.ruby-version
index 860487c..a4dd9db 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.7.1
+2.7.4
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 1fe1948..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-language: ruby
-rvm:
-  - 2.7.1
-before_install: gem install bundler -v 1.10.6