diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 46341f1007..110cfeaf12 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: [2.2.10, 3.1.2, jruby-9.3.8.0]
+        ruby-version: [2.2.10, 3.1.2, jruby-9.3.9.0]
     steps:
       - name: Configure git
         run: 'git config --global init.defaultBranch main'
@@ -58,12 +58,12 @@ jobs:
               "3.1.2": {
                 "rails": "norails,rails61,rails70"
               },
-              "jruby-9.3.8.0": {
+              "jruby-9.3.9.0": {
                 "rails": "norails,rails61,rails52,rails42"
               }
             }
 
-      - if: matrix.ruby-version == '2.2.10' || matrix.ruby-version == 'jruby-9.3.8.0'
+      - if: matrix.ruby-version == '2.2.10' || matrix.ruby-version == 'jruby-9.3.9.0'
         name: Cache mysql55
         id: mysql55-cache
         uses: john-shaffer/cache@sudo-tar
@@ -71,7 +71,7 @@ jobs:
           path: /usr/local/mysql55
           key: mysql55-install
 
-      - if: steps.mysql55-cache.outputs.cache-hit != 'true' && (matrix.ruby-version == '2.2.10' || matrix.ruby-version == 'jruby-9.3.8.0')
+      - if: steps.mysql55-cache.outputs.cache-hit != 'true' && (matrix.ruby-version == '2.2.10' || matrix.ruby-version == 'jruby-9.3.9.0')
         name: Install mysql55
         run: sudo ./test/script/install_mysql55
 
@@ -390,7 +390,7 @@ jobs:
       - name: Install JRuby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: jruby-9.3.8.0
+          ruby-version: jruby-9.3.9.0
         env:
           JAVA_HOME: /usr/lib/jvm/temurin-8-jdk-amd64
 
diff --git a/.github/workflows/ci_cron.yml b/.github/workflows/ci_cron.yml
index 4961dce698..256e37195b 100644
--- a/.github/workflows/ci_cron.yml
+++ b/.github/workflows/ci_cron.yml
@@ -35,7 +35,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: [2.2.10, 2.3.8, 2.4.10, 2.5.9, 2.6.10, 2.7.6, 3.0.4, 3.1.2, 3.2.0-preview2, jruby-9.3.8.0]
+        ruby-version: [2.2.10, 2.3.8, 2.4.10, 2.5.9, 2.6.10, 2.7.6, 3.0.4, 3.1.2, 3.2.0-preview2, jruby-9.3.9.0]
 
     steps:
       - name: Configure git
@@ -86,12 +86,12 @@ jobs:
               "3.2.0-preview2": {
                 "rails": "norails,rails61,rails70,railsedge"
               },
-              "jruby-9.3.8.0": {
+              "jruby-9.3.9.0": {
                 "rails": "norails,rails61,rails60,rails52,rails51,rails50,rails42"
               }
             }
 
-      - if: matrix.ruby-version == '2.2.10' || matrix.ruby-version == '2.3.8' || matrix.ruby-version == '2.4.10' || matrix.ruby-version == '2.5.9' || matrix.ruby-version == '2.6.10' || matrix.ruby-version == 'jruby-9.3.8.0'
+      - if: matrix.ruby-version == '2.2.10' || matrix.ruby-version == '2.3.8' || matrix.ruby-version == '2.4.10' || matrix.ruby-version == '2.5.9' || matrix.ruby-version == '2.6.10' || matrix.ruby-version == 'jruby-9.3.9.0'
         name: Cache mysql55
         id: mysql55-cache
         uses: john-shaffer/cache@sudo-tar
@@ -99,7 +99,7 @@ jobs:
           path: /usr/local/mysql55
           key: mysql55-install
 
-      - if: steps.mysql55-cache.outputs.cache-hit != 'true' && ( matrix.ruby-version == '2.2.10' || matrix.ruby-version == '2.3.8' || matrix.ruby-version == '2.4.10' || matrix.ruby-version == '2.5.9' || matrix.ruby-version == '2.6.10' || matrix.ruby-version == 'jruby-9.3.8.0')
+      - if: steps.mysql55-cache.outputs.cache-hit != 'true' && ( matrix.ruby-version == '2.2.10' || matrix.ruby-version == '2.3.8' || matrix.ruby-version == '2.4.10' || matrix.ruby-version == '2.5.9' || matrix.ruby-version == '2.6.10' || matrix.ruby-version == 'jruby-9.3.9.0')
         name: Install mysql55
         run: sudo ./test/script/install_mysql55
 
@@ -379,7 +379,7 @@ jobs:
       - name: Install JRuby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: jruby-9.3.8.0
+          ruby-version: jruby-9.3.9.0
         env:
           JAVA_HOME: /usr/lib/jvm/temurin-8-jdk-amd64