diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6b2af8669..76c4fe0b1 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -21,9 +21,7 @@ jobs:
             go get github.com/onsi/gomega
       - run:
           name: "Build infos"
-          command: |
-            echo $GOARCH
-            go version
+          command: go version
       - run:
           name: "Run benchmark tests"
           command: ginkgo -randomizeAllSpecs -trace benchmark -- -samples=1
@@ -46,10 +44,6 @@ workflows:
   workflow:
     jobs:
       - build:
-          name: "Go 1.11"
-          image: "circleci/golang:1.11-stretch-browsers"
+          name: "Go 1.12rc1"
+          image: "circleci/golang:1.12rc1"
           runrace: true
-      - build:
-          name: "Go 1.10"
-          image: "circleci/golang:1.10-stretch-browsers"
-          runrace: false
diff --git a/.travis.yml b/.travis.yml
index eefceecdc..69a0470c2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,8 +4,7 @@ group: travis_latest
 language: go
 
 go:
-  - "1.10.4"
-  - "1.11"
+  - "1.12rc1"
 
 # first part of the GOARCH workaround
 # setting the GOARCH directly doesn't work, since the value will be overwritten later
@@ -20,14 +19,6 @@ env:
     - TRAVIS_GOARCH=386 TESTMODE=unit
     - TRAVIS_GOARCH=386 TESTMODE=integration
 
-# Linters might work differently in different Go versions.
-# Only run them in the most recent one.
-matrix:
-  exclude:
-  - go: "1.10.4"
-    env: TRAVIS_GOARCH=amd64 TESTMODE=lint
-  - go: "1.10.4"
-    env: TRAVIS_GOARCH=386 TESTMODE=lint
 
 # second part of the GOARCH workaround
 # now actually set the GOARCH env variable to the value of the temporary variable set earlier
diff --git a/appveyor.yml b/appveyor.yml
index 5e44d0021..aaf8aed95 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,8 +14,8 @@ clone_folder: c:\gopath\src\github.com\lucas-clemente\quic-go
 
 install:
   - rmdir c:\go /s /q
-  - appveyor DownloadFile https://storage.googleapis.com/golang/go1.11.windows-amd64.zip
-  - 7z x go1.11.windows-amd64.zip -y -oC:\ > NUL
+  - appveyor DownloadFile https://storage.googleapis.com/golang/go1.12rc1.windows-amd64.zip
+  - 7z x go1.12rc1.windows-amd64.zip -y -oC:\ > NUL
   - set PATH=%PATH%;%GOPATH%\bin\windows_%GOARCH%;%GOPATH%\bin
   - echo %PATH%
   - echo %GOPATH%