diff --git a/.circleci/config.yml b/.circleci/config.yml
index 13db5fc..1ba296d 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -30,7 +30,7 @@ defaults_gradle: &defaults_gradle
 version: 2.0
 
 jobs:
-  build_gradle_jdk11:
+  build_gradle_jdk12:
     <<: *defaults
 
     docker:
@@ -38,22 +38,6 @@ jobs:
 
     <<: *defaults_gradle
 
-  build_gradle_jdk10:
-    <<: *defaults
-
-    docker:
-      - image: circleci/openjdk:10-jdk
-
-    <<: *defaults_gradle
-
-  build_gradle_jdk9:
-    <<: *defaults
-
-    docker:
-      - image: circleci/openjdk:9-jdk
-
-    <<: *defaults_gradle
-
   build_gradle_jdk8:
     <<: *defaults
 
@@ -99,8 +83,7 @@ workflows:
   gradle:
         jobs:
         - build_gradle_jdk8
-        - build_gradle_jdk9
-        - build_gradle_jdk10
+        - build_gradle_jdk12
   kobalt:
         jobs:
         - build_kobalt