diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5b7f08dd6..bde67d69c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        java: [jdk11, jdk17, jdk18, jdk21, graalvm]
+        java: [jdk11, jdk17, jdk21, jdk22, graalvm]
       fail-fast: false
     steps:
       - name: Check out the repository
@@ -22,9 +22,9 @@ jobs:
       - name: Test in Linux JDK 17 (LTS)
         if: matrix.os == 'ubuntu-latest' && matrix.java == 'jdk17'
         run: docker compose -f docker/Linux-JDK17/compose.yml up --build --exit-code-from cantaloupe
-      - name: Test in Linux JDK 18
-        if: matrix.os == 'ubuntu-latest' && matrix.java == 'jdk18'
-        run: docker compose -f docker/Linux-JDK18/docker-compose.yml up --build --exit-code-from cantaloupe
+      - name: Test in Linux JDK 22 (non-LTS)
+        if: matrix.os == 'ubuntu-latest' && matrix.java == 'jdk22'
+        run: docker compose -f docker/Linux-JDK22/compose.yaml up --build --exit-code-from cantaloupe
       - name: Test in Linux JDK 21 (LTS)
         if: matrix.os == 'ubuntu-latest' && matrix.java == 'jdk21'
         run: docker compose -f docker/Linux-JDK21/compose.yml up --build --exit-code-from cantaloupe
@@ -37,9 +37,9 @@ jobs:
       - name: Test in Windows JDK 17 (LTS)
         if: matrix.os == 'windows-latest' && matrix.java == 'jdk17'
         run: docker compose -f docker/Windows-JDK17/compose.yml up --build --exit-code-from cantaloupe
-      - name: Test in Windows JDK 18
-        if: matrix.os == 'windows-latest' && matrix.java == 'jdk18'
-        run: docker compose -f docker/Windows-JDK18/docker-compose.yml up --build --exit-code-from cantaloupe
+      - name: Test in Windows JDK 22 (non-LTS)
+        if: matrix.os == 'windows-latest' && matrix.java == 'jdk22'
+        run: docker compose -f docker/Windows-JDK22/compose.yaml up --build --exit-code-from cantaloupe
       - name: Test in Windows JDK 21 (LTS)
         if: matrix.os == 'windows-latest' && matrix.java == 'jdk21'
         run: docker compose -f docker/Windows-JDK21/compose.yml up --build --exit-code-from cantaloupe
diff --git a/docker/Linux-JDK18/Dockerfile b/docker/Linux-JDK22/Dockerfile
similarity index 73%
rename from docker/Linux-JDK18/Dockerfile
rename to docker/Linux-JDK22/Dockerfile
index d7f545d85..9843c332f 100644
--- a/docker/Linux-JDK18/Dockerfile
+++ b/docker/Linux-JDK22/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:noble
+FROM ubuntu:lunar
 
 ENV JAVA_HOME=/opt/jdk
 ENV PATH=$PATH:/opt/jdk/bin:/opt/maven/bin
@@ -36,15 +36,10 @@ COPY docker/image_files/libjpeg-turbo/lib64 /opt/libjpeg-turbo/lib
 COPY dist/deps/Linux-x86-64/lib/* /usr/lib/
 
 # Install various other dependencies that aren't in apt
-# Install GrokProcessor dependencies
-#RUN wget -q https://github.com/GrokImageCompression/grok/releases/download/v7.6.5/libgrokj2k1_7.6.5-1_amd64.deb \
-#    && wget -q https://github.com/GrokImageCompression/grok/releases/download/v7.6.5/grokj2k-tools_7.6.5-1_amd64.deb \
-#    && dpkg -i ./libgrokj2k1_7.6.5-1_amd64.deb \
-#    && dpkg -i --ignore-depends=libjpeg62-turbo ./grokj2k-tools_7.6.5-1_amd64.deb \
 # Install OpenJDK
-RUN wget -q https://download.java.net/java/GA/jdk18/43f95e8614114aeaa8e8a5fcf20a682d/36/GPL/openjdk-18_linux-x64_bin.tar.gz \
-  && tar xfz openjdk-18_linux-x64_bin.tar.gz \
-  && mv jdk-18 /opt/jdk \
+RUN wget -q https://download.java.net/java/GA/jdk22.0.2/c9ecb94cd31b495da20a27d4581645e8/9/GPL/openjdk-22.0.2_linux-x64_bin.tar.gz \
+  && tar xfz openjdk-22.0.2_linux-x64_bin.tar.gz \
+  && mv jdk-22.0.2 /opt/jdk \
   # Install a newer Maven than the one in apt
   && wget -q https://dlcdn.apache.org/maven/maven-3/3.8.8/binaries/apache-maven-3.8.8-bin.tar.gz \
   && tar xfz apache-maven-3.8.8-bin.tar.gz \
diff --git a/docker/Linux-JDK18/docker-compose.yml b/docker/Linux-JDK22/compose.yaml
similarity index 58%
rename from docker/Linux-JDK18/docker-compose.yml
rename to docker/Linux-JDK22/compose.yaml
index 7b2572bc0..90fd3cf1f 100644
--- a/docker/Linux-JDK18/docker-compose.yml
+++ b/docker/Linux-JDK22/compose.yaml
@@ -1,14 +1,13 @@
 #
-# N.B.: docker-compose must be invoked from the project root directory:
+# N.B.: docker compose must be invoked from the project root directory:
 #
-# docker-compose -f path/to/docker-compose.yml up --exit-code-from cantaloupe
+# docker compose -f path/to/compose.yaml up --exit-code-from cantaloupe
 #
-version: '3'
 services:
   cantaloupe:
     build:
       context: ../../
-      dockerfile: $PWD/docker/Linux-JDK18/Dockerfile
+      dockerfile: $PWD/docker/Linux-JDK22/Dockerfile
   minio:
     image: minio/minio
     environment:
diff --git a/docker/Windows-JDK18/docker-compose.yml b/docker/Windows-JDK18/docker-compose.yml
deleted file mode 100644
index 3c5812953..000000000
--- a/docker/Windows-JDK18/docker-compose.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-#
-# N.B.: docker-compose must be invoked from the project root directory:
-#
-# docker-compose -f path/to/docker-compose.yml up --exit-code-from cantaloupe
-#
-version: '3'
-services:
-  cantaloupe:
-    build:
-      context: ../../
-      dockerfile: docker/Windows-JDK18/Dockerfile
-  minio:
-    build:
-      context: ../../
-      dockerfile: docker/Windows-JDK18/Dockerfile-minio
-    environment:
-      MINIO_ACCESS_KEY: MinioUser
-      MINIO_SECRET_KEY: OpenSesame
-    hostname: minio
diff --git a/docker/Windows-JDK18/Dockerfile b/docker/Windows-JDK22/Dockerfile
similarity index 95%
rename from docker/Windows-JDK18/Dockerfile
rename to docker/Windows-JDK22/Dockerfile
index 4a8794818..8d7098814 100644
--- a/docker/Windows-JDK18/Dockerfile
+++ b/docker/Windows-JDK22/Dockerfile
@@ -11,7 +11,7 @@ RUN powershell -Command \
 # Install various dependencies
 # TODO: openjpeg
 RUN choco install -y maven ffmpeg
-RUN choco install -y openjdk --version=18.0.2
+RUN choco install -y openjdk --version=22.0.2
 
 # Install TurboJpegProcessor dependencies TODO: libjpeg-turbo
 #RUN mkdir -p /opt/libjpeg-turbo/lib
diff --git a/docker/Windows-JDK18/Dockerfile-minio b/docker/Windows-JDK22/Dockerfile-minio
similarity index 100%
rename from docker/Windows-JDK18/Dockerfile-minio
rename to docker/Windows-JDK22/Dockerfile-minio
diff --git a/docker/Windows-JDK22/compose.yaml b/docker/Windows-JDK22/compose.yaml
new file mode 100644
index 000000000..7cb2575c6
--- /dev/null
+++ b/docker/Windows-JDK22/compose.yaml
@@ -0,0 +1,18 @@
+#
+# N.B.: docker compose must be invoked from the project root directory:
+#
+# docker compose -f path/to/compose.yaml up --exit-code-from cantaloupe
+#
+services:
+  cantaloupe:
+    build:
+      context: ../../
+      dockerfile: docker/Windows-JDK22/Dockerfile
+  minio:
+    build:
+      context: ../../
+      dockerfile: docker/Windows-JDK22/Dockerfile-minio
+    environment:
+      MINIO_ACCESS_KEY: MinioUser
+      MINIO_SECRET_KEY: OpenSesame
+    hostname: minio