diff --git a/.circleci/config.yml b/.circleci/config.yml
index 1db0cc4..77889be 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -20,14 +20,6 @@ defaults_gradle: &defaults_bld
         command: ./bld test
 
 jobs:
-  bld_jdk11:
-    <<: *defaults
-
-    docker:
-      - image: cimg/openjdk:11.0
-
-    <<: *defaults_bld
-
   bld_jdk17:
     <<: *defaults
 
@@ -48,6 +40,5 @@ workflows:
   version: 2
   bld:
     jobs:
-      - bld_jdk11
       - bld_jdk17
       - bld_jdk20
diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index a765b42..ba51eb1 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        java-version: [ 11, 17, 20 ]
+        java-version: [ 17, 20 ]
 
     steps:
       - name: Checkout source repository
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index fe7fe02..bb3f3bd 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: java:11:latest
+image: java:17:latest
 
 cache:
   paths: