diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6416a2e74..2200fe81b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -6,7 +6,7 @@ executors:
   # should also be updated.
   golang:
     docker:
-    - image: circleci/golang:1.11
+    - image: circleci/golang:1.12
 
 jobs:
   test:
diff --git a/.promu.yml b/.promu.yml
index 5937513b5..9fc1271d0 100644
--- a/.promu.yml
+++ b/.promu.yml
@@ -1,7 +1,7 @@
 go:
     # Whenever the Go version is updated here, .travis.yml and
     # .circle/config.yml should also be updated.
-    version: 1.11
+    version: 1.12
 repository:
     path: github.com/prometheus/prometheus
 build:
diff --git a/.travis.yml b/.travis.yml
index 7e005a95b..61ee373a0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,7 @@ language: go
 # Whenever the Go version is updated here, .circleci/config.yml and .promu.yml
 # should also be updated.
 go:
-- 1.11.x
+- 1.12.x
 
 go_import_path: github.com/prometheus/prometheus