diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index cdeb5ac..c8b1f55 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,4 +1,8 @@
-name: nf-kafka CI
+name: build
+
+env:
+  java_version: 17
+
 on:
   push:
     branches:
@@ -10,14 +14,14 @@ on:
       - '*'
 jobs:
   build:
-    name: Build nf-kafka
+    name: Build
     if: "!contains(github.event.head_commit.message, '[ci skip]')"
     runs-on: ubuntu-latest
     timeout-minutes: 10
     strategy:
       fail-fast: false
       matrix:
-        java_version: [11, 17]
+        java_version: [17]
 
     steps:
       - name: Environment
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ae85183..4d2d639 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -1,4 +1,8 @@
 name: release
+
+env:
+  java_version: 17
+
 on:
   push:
     tags:
@@ -14,8 +18,6 @@ jobs:
     timeout-minutes: 90
     strategy:
       fail-fast: false
-      matrix:
-        java_version: [11, 17]
 
     steps:
       - name: Environment
@@ -27,10 +29,10 @@ jobs:
           fetch-depth: 1
           submodules: true
 
-      - name: Setup Java ${{ matrix.java_version }}
+      - name: Setup Java $java_version
         uses: actions/setup-java@v1
         with:
-          java-version: ${{matrix.java_version}}
+          java-version: $java_version
           architecture: x64
 
       - name: Compile
@@ -46,10 +48,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Set up JDK 19 for x64
+      - name: Set up JDK $java_version for x64
         uses: actions/setup-java@v3
         with:
-          java-version: "19"
+          java-version: "$java_version"
           distribution: "temurin"
           architecture: x64