diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7e013d3c287..bb49464245e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest ]
-        java: [ 21, 17, 11 ]
+        java: [ 21, 17 ]
         experimental: [ false ]
         # Only test on macos and windows with a single recent JDK to avoid a
         # combinatorial explosion of test configurations.
@@ -52,12 +52,6 @@ jobs:
           access_token: ${{ github.token }}
       - name: 'Check out repository'
         uses: actions/checkout@v3
-      - name: 'Set up JDK 11'
-        uses: actions/setup-java@v4
-        with:
-          java-version: 11
-          distribution: 'zulu'
-          cache: 'maven'
       - name: 'Set up JDK 17'
         uses: actions/setup-java@v4
         with:
@@ -90,13 +84,7 @@ jobs:
       - name: 'Test'
         shell: bash
         run: mvn test -B
-      - name: 'Test compatibility with JDK 11'
-        if: ${{ matrix.java == 17 }}
-        shell: bash
-        run: mvn test -B -Dsurefire.jdk-toolchain-version=11
       - name: 'Javadoc'
-        # only generate javadoc on JDKs with the fix for https://bugs.openjdk.org/browse/JDK-8241780
-        if: ${{ matrix.java >= 15 }}
         shell: bash
         run: mvn -P '!examples' javadoc:javadoc
 
@@ -117,9 +105,7 @@ jobs:
       - name: 'Set up JDK 17'
         uses: actions/setup-java@v4
         with:
-          java-version: |
-            11
-            17
+          java-version: 17
           distribution: 'zulu'
           cache: 'maven'
           server-id: ossrh
@@ -151,9 +137,7 @@ jobs:
       - name: 'Set up JDK 17'
         uses: actions/setup-java@v4
         with:
-          java-version: |
-            11
-            17
+          java-version: 17
           distribution: 'zulu'
           cache: 'maven'
       - name: 'Generate latest docs'