diff --git a/docker/README.md b/docker/README.md
index 9970aaed5d..d96242b321 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -10,10 +10,10 @@ cd /path/to/netty/
 docker-compose -f docker/docker-compose.yaml -f docker/docker-compose.centos-6.18.yaml run test
 ```
 
-## centos 7 with java 9
+## centos 7 with java 11
 
 ```
-docker-compose -f docker/docker-compose.yaml -f docker/docker-compose.centos-7.19.yaml run test
+docker-compose -f docker/docker-compose.yaml -f docker/docker-compose.centos-7.111.yaml run test
 ```
 
 etc, etc
diff --git a/docker/docker-compose.centos-6.110.yaml b/docker/docker-compose.centos-6.110.yaml
index 144780de9e..7a60f46e32 100644
--- a/docker/docker-compose.centos-6.110.yaml
+++ b/docker/docker-compose.centos-6.110.yaml
@@ -7,7 +7,7 @@ services:
     build:
       args:
         centos_version : "6"
-        java_version : "openjdk@1.10.0-2"
+        java_version : "zulu@1.10.0-2"
 
   test:
     image: netty:centos-6-1.10
diff --git a/docker/docker-compose.centos-6.112.yaml b/docker/docker-compose.centos-6.112.yaml
index e69babcafa..aee3e1fe2c 100644
--- a/docker/docker-compose.centos-6.112.yaml
+++ b/docker/docker-compose.centos-6.112.yaml
@@ -7,7 +7,7 @@ services:
     build:
       args:
         centos_version : "6"
-        java_version : "adopt@1.12.0-1"
+        java_version : "adopt@1.12.0-2"
 
   test:
     image: netty:centos-6-1.12
diff --git a/docker/docker-compose.centos-6.graalvm1.yaml b/docker/docker-compose.centos-6.graalvm1.yaml
index 4d2fce97d6..f00fb2bfdc 100644
--- a/docker/docker-compose.centos-6.graalvm1.yaml
+++ b/docker/docker-compose.centos-6.graalvm1.yaml
@@ -7,7 +7,7 @@ services:
     build:
       args:
         centos_version : "6"
-        java_version : "graalvm@19.0.0"
+        java_version : "graalvm@19.1.1"
 
   test:
     image: netty:centos-6-1.8
diff --git a/docker/docker-compose.centos-7.110.yaml b/docker/docker-compose.centos-7.110.yaml
index 7f165208e1..280ed73b96 100644
--- a/docker/docker-compose.centos-7.110.yaml
+++ b/docker/docker-compose.centos-7.110.yaml
@@ -7,7 +7,7 @@ services:
     build:
       args:
         centos_version : "7"
-        java_version : "openjdk@1.10.0-2"
+        java_version : "zulu@1.10.0-2"
 
   test:
     image: netty:centos-7-1.10
diff --git a/docker/docker-compose.centos-7.112.yaml b/docker/docker-compose.centos-7.112.yaml
index 72d2b28f48..d628188bba 100644
--- a/docker/docker-compose.centos-7.112.yaml
+++ b/docker/docker-compose.centos-7.112.yaml
@@ -7,7 +7,7 @@ services:
     build:
       args:
         centos_version : "7"
-        java_version : "adopt@1.12.0-1"
+        java_version : "adopt@1.12.0-2"
 
   test:
     image: netty:centos-7-1.12
diff --git a/docker/docker-compose.centos-7.19.yaml b/docker/docker-compose.centos-7.19.yaml
index 4df1e5932e..d1b6acf634 100644
--- a/docker/docker-compose.centos-7.19.yaml
+++ b/docker/docker-compose.centos-7.19.yaml
@@ -7,7 +7,7 @@ services:
     build:
       args:
         centos_version : "7"
-        java_version : "openjdk@1.9.0-7"
+        java_version : "zulu@1.9.0-7"
 
   test:
     image: netty:centos-7-1.9
diff --git a/docker/docker-sync-compose.centos-6.18.yaml b/docker/docker-sync-compose.centos-6.18.yaml
deleted file mode 100644
index 34e0e58e67..0000000000
--- a/docker/docker-sync-compose.centos-6.18.yaml
+++ /dev/null
@@ -1,34 +0,0 @@
-version: "3"
-
-services:
-
-  runtime-setup:
-    image: netty:centos-6-1.8
-    build:
-      args:
-        centos_version : "6"
-        java_version : "adopt@1.8.222-10"
-
-  test:
-    image: netty:centos-6-1.8
-    volumes:
-      - code-sync:/code:nocopy
-
-  test-leak:
-    image: netty:centos-6-1.8
-    volumes:
-      - code-sync:/code:nocopy
-
-  test-boringssl-static:
-    image: netty:centos-6-1.8
-    volumes:
-      - code-sync:/code:nocopy
-
-  shell:
-    image: netty:centos-6-1.8
-    volumes:
-      - code-sync:/code:nocopy
-
-volumes:
-  code-sync:
-    external: true
diff --git a/docker/docker-sync.centos-6.18.yaml b/docker/docker-sync.centos-6.18.yaml
deleted file mode 100644
index 98a3c121ef..0000000000
--- a/docker/docker-sync.centos-6.18.yaml
+++ /dev/null
@@ -1,8 +0,0 @@
-version: "2"
-
-compose-dev-file-path: 'docker-sync-compose.centos-6.18.yaml'
-
-syncs:
-  #IMPORTANT: ensure this name is unique and does not match your other application container name
-  code-sync: #tip: add -sync and you keep consistent names as a convention
-    src: '../'