diff --git a/.github/workflows/jruby_head.yml b/.github/workflows/jruby_head.yml
index 37e31f4..379d5d2 100644
--- a/.github/workflows/jruby_head.yml
+++ b/.github/workflows/jruby_head.yml
@@ -40,8 +40,8 @@ jobs:
     - name: Set up Java
       uses: actions/setup-java@v6
       with:
-        distribution: oracle
-        java-version: '21'
+        distribution: temurin
+        java-version: '25'
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4d60d34..25376d6 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -44,8 +44,8 @@ jobs:
       if: startsWith(matrix.ruby, 'jruby')
       uses: actions/setup-java@v6
       with:
-        distribution: oracle
-        java-version: '21'
+        distribution: temurin
+        java-version: '25'
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
diff --git a/.github/workflows/test_11g.yml b/.github/workflows/test_11g.yml
index c2c33ae..4611f09 100644
--- a/.github/workflows/test_11g.yml
+++ b/.github/workflows/test_11g.yml
@@ -50,8 +50,8 @@ jobs:
       if: startsWith(matrix.ruby, 'jruby')
       uses: actions/setup-java@v6
       with:
-        distribution: oracle
-        java-version: '21'
+        distribution: temurin
+        java-version: '25'
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
diff --git a/.github/workflows/test_11g_ojdbc11.yml b/.github/workflows/test_11g_ojdbc11.yml
index 59a3196..e66bcee 100644
--- a/.github/workflows/test_11g_ojdbc11.yml
+++ b/.github/workflows/test_11g_ojdbc11.yml
@@ -46,8 +46,8 @@ jobs:
     - name: Set up Java
       uses: actions/setup-java@v6
       with:
-        distribution: oracle
-        java-version: '21'
+        distribution: temurin
+        java-version: '25'
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
diff --git a/README.md b/README.md
index ca03d9e..30af6b9 100644
--- a/README.md
+++ b/README.md
@@ -160,7 +160,7 @@ In addition install either ruby-oci8 (for MRI/YARV) or copy Oracle JDBC driver t
 If you are using MRI Ruby implementation then you need to install ruby-oci8 gem (version 2.1 or higher)
 as well as Oracle client, e.g. [Oracle Instant Client](https://www.oracle.com/database/technologies/instant-client/downloads.html).
 
-If you are using JRuby then you need to download the appropriate [Oracle JDBC driver](https://www.oracle.com/database/technologies/appdev/jdbc-downloads.html) for your Java version. CI exercises ojdbc17.jar and ojdbc11.jar on Java 21.
+If you are using JRuby then you need to download the appropriate [Oracle JDBC driver](https://www.oracle.com/database/technologies/appdev/jdbc-downloads.html) for your Java version. CI exercises ojdbc17.jar and ojdbc11.jar on Java 25.
 
 And copy this file to one of these locations. JDBC driver will be searched in this order: