diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 708ff1a9..6afb38e5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - run: |
@@ -33,10 +33,10 @@ jobs:
           echo exit code $?
           git tag --list
 
-      - name: Set up JDK 1.8
-        uses: actions/setup-java@v3
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
         with:
-          java-version: '8'
+          java-version: '17'
           distribution: 'zulu'
 
       - name: Cache Maven packages
@@ -56,8 +56,8 @@ jobs:
       # The skipped tests is because h2o-xgboost isn't ready to use with musl
       - name: Test with musl
         run: |
-          docker run --rm -t -v ~/.m2:/root/.m2 -v $(pwd):/feedzai-openml-java -e FDZ_OPENML_JAVA_LIBC="musl" alpine:3.18.4 \
-          /bin/sh -c 'apk add clang openjdk8 maven bash git && \
+          docker run --rm -t -v ~/.m2:/root/.m2 -v $(pwd):/feedzai-openml-java -e FDZ_OPENML_JAVA_LIBC="musl" alpine:3.20 \
+          /bin/sh -c 'apk add clang openjdk17 maven bash git && \
           git config --global --add safe.directory /feedzai-openml-java && \
           git config --global --add safe.directory /feedzai-openml-java/openml-lightgbm/lightgbm-builder/make-lightgbm && \
           cd /feedzai-openml-java && \
@@ -67,7 +67,7 @@ jobs:
       # The skipped tests is because h2o-xgboost isn't ready to use on arm64
       - name: Test on arm64
         run: |
-          docker run --rm --platform=arm64 -t -v ~/.m2:/root/.m2 -v $(pwd):/feedzai-openml-java maven:3.8-openjdk-8-slim \
+          docker run --rm --platform=arm64 -t -v ~/.m2:/root/.m2 -v $(pwd):/feedzai-openml-java maven:3.9-eclipse-temurin-17 \
           /bin/bash -c 'apt update && apt install -y --no-install-recommends git && \
           git config --global --add safe.directory /feedzai-openml-java && \
           git config --global --add safe.directory /feedzai-openml-java/openml-lightgbm/lightgbm-builder/make-lightgbm && \
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index b58617fb..7ae0afbb 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - run: |
@@ -23,10 +23,10 @@ jobs:
           echo exit code $?
           git tag --list
 
-      - name: Set up JDK 1.8
-        uses: actions/setup-java@v3
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
         with:
-          java-version: '8'
+          java-version: '17'
           distribution: 'zulu'
           server-id: ossrh
           server-username: MAVEN_USERNAME
diff --git a/openml-datarobot/pom.xml b/openml-datarobot/pom.xml
index a49a695c..c19bd5bf 100644
--- a/openml-datarobot/pom.xml
+++ b/openml-datarobot/pom.xml
@@ -92,11 +92,6 @@
             <scope>test</scope>
             <type>test-jar</type>
         </dependency>
-        <dependency>
-            <groupId>org.jmockit</groupId>
-            <artifactId>jmockit</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>com.google.auto.service</groupId>
             <artifactId>auto-service</artifactId>
@@ -111,6 +106,11 @@
             <artifactId>assertj-core</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>com.feedzai</groupId>
             <artifactId>openml-java-utils</artifactId>
diff --git a/openml-datarobot/src/test/java/com/feedzai/openml/datarobot/DataRobotModelProviderLoadTest.java b/openml-datarobot/src/test/java/com/feedzai/openml/datarobot/DataRobotModelProviderLoadTest.java
index 154c9722..fe745bf2 100644
--- a/openml-datarobot/src/test/java/com/feedzai/openml/datarobot/DataRobotModelProviderLoadTest.java
+++ b/openml-datarobot/src/test/java/com/feedzai/openml/datarobot/DataRobotModelProviderLoadTest.java
@@ -30,7 +30,6 @@
 import com.feedzai.openml.provider.exception.ModelLoadingException;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
-import mockit.Mocked;
 import org.assertj.core.api.Assertions;
 import org.junit.Test;
 import org.slf4j.Logger;
@@ -51,6 +50,7 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatCode;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.Mockito.mock;
 
 /**
  * Tests for loading models with {@link DataRobotModelProvider}.
@@ -375,13 +375,12 @@ public double getValue(final int index) {
     /**
      * Tests that fetching the labels from a model that does not contain them yields a default value.
      *
-     * @param mockedPredictor The mocked predictor.
-     *
      * @since 0.5.8
      */
     @Test
-    public void readUnexistingTargetLabelsTest(final @Mocked Predictor mockedPredictor) {
-        assertThat(new DataRobotModelCreator().getTargetModelValues(mockedPredictor))
+    public void readUnexistingTargetLabelsTest() {
+        final Predictor predictor = mock(Predictor.class);
+        assertThat(new DataRobotModelCreator().getTargetModelValues(predictor))
                 .as("The target labels")
                 .containsExactlyInAnyOrder("0", "1");
     }
diff --git a/openml-java-utils/pom.xml b/openml-java-utils/pom.xml
index ee95a2e7..d7c8bd3e 100644
--- a/openml-java-utils/pom.xml
+++ b/openml-java-utils/pom.xml
@@ -63,8 +63,8 @@
             <scope>test</scope>
         </dependency>
         <dependency>
-            <groupId>org.jmockit</groupId>
-            <artifactId>jmockit</artifactId>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/openml-java-utils/src/test/java/com/feedzai/openml/java/utils/ModelParameterUtilsTest.java b/openml-java-utils/src/test/java/com/feedzai/openml/java/utils/ModelParameterUtilsTest.java
index 83263637..78724134 100644
--- a/openml-java-utils/src/test/java/com/feedzai/openml/java/utils/ModelParameterUtilsTest.java
+++ b/openml-java-utils/src/test/java/com/feedzai/openml/java/utils/ModelParameterUtilsTest.java
@@ -24,29 +24,32 @@
 import com.feedzai.openml.provider.descriptor.fieldtype.NumericFieldType;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSet;
-import mockit.Expectations;
-import mockit.Mocked;
-import mockit.integration.junit4.JMockit;
 import org.junit.Test;
-import org.junit.runner.RunWith;
 
 import java.util.Map;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 
 /**
  * Validates the behaviour of {@link ModelParameterUtils}.
  */
-@RunWith(JMockit.class)
 public class ModelParameterUtilsTest {
 
     /**
-     * Validates that effective model parameters are being correctly calculated.s
-     *
-     * @param mlAlgorithmDescriptor The mocked ML algorithm.
+     * Validates that effective model parameters are being correctly calculated.
      */
     @Test
-    public final void effectiveModelParameterValues(@Mocked final MLAlgorithmDescriptor mlAlgorithmDescriptor) {
+    public final void effectiveModelParameterValues() {
+
+        final MLAlgorithmDescriptor mlAlgorithmDescriptor = mock(MLAlgorithmDescriptor.class);
+        when(mlAlgorithmDescriptor.getParameters()).thenReturn(ImmutableSet.of(
+                new ModelParameter("param0", "", "", true, new BooleanFieldType(false)),
+                new ModelParameter("param1", "", "", true, new FreeTextFieldType("1")),
+                new ModelParameter("param2", "", "", true, NumericFieldType.min(0d, NumericFieldType.ParameterConfigType.INT, 2d)),
+                new ModelParameter("param3", "", "", true, new ChoiceFieldType(ImmutableSet.of("1", "2", "3"), "3"))
+        ));
 
         final Map<String, String> expectedParams = ImmutableMap.of(
                 "param0", "false",
@@ -56,16 +59,6 @@ public final void effectiveModelParameterValues(@Mocked final MLAlgorithmDescrip
                 "param1", "99"
         );
 
-        new Expectations() {{
-            mlAlgorithmDescriptor.getParameters();
-            result = ImmutableSet.of(
-                    new ModelParameter("param0", "", "", true, new BooleanFieldType(false)),
-                    new ModelParameter("param1", "", "", true, new FreeTextFieldType("1")),
-                    new ModelParameter("param2", "", "", true, NumericFieldType.min(0d, NumericFieldType.ParameterConfigType.INT, 2d)),
-                    new ModelParameter("param3", "", "", true, new ChoiceFieldType(ImmutableSet.of("1", "2", "3"), "3"))
-            );
-        }};
-
         final Map<String, String> effectiveParams = ModelParameterUtils.getEffectiveModelParameterValues(
                 mlAlgorithmDescriptor,
                 ImmutableSet.of("param0", "param1", "param2", "param3", "param4"),
diff --git a/pom.xml b/pom.xml
index c44da522..a6a71beb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -70,9 +70,9 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.source>1.8</project.source>
+        <java.release>8</java.release>
         <junit.version>4.13.1</junit.version>
         <assertj.version>3.7.0</assertj.version>
-        <jmockit.version>1.35</jmockit.version>
         <openml-api.version>1.2.0</openml-api.version>
         <jackson.version>2.6.7</jackson.version>
         <jackson-databind.version>2.6.7</jackson-databind.version>
@@ -188,9 +188,9 @@
                 <scope>test</scope>
             </dependency>
             <dependency>
-                <groupId>org.jmockit</groupId>
-                <artifactId>jmockit</artifactId>
-                <version>${jmockit.version}</version>
+                <groupId>org.mockito</groupId>
+                <artifactId>mockito-core</artifactId>
+                <version>4.11.0</version>
                 <scope>test</scope>
             </dependency>
             <dependency>
@@ -208,10 +208,9 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-compiler-plugin</artifactId>
-                    <version>3.7.0</version>
+                    <version>3.13.0</version>
                     <configuration>
-                        <source>1.8</source>
-                        <target>1.8</target>
+                        <release>${java.release}</release>
                     </configuration>
                 </plugin>
                 <plugin>
@@ -222,7 +221,16 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-surefire-plugin</artifactId>
-                    <version>3.0.0-M5</version>
+                    <version>3.5.2</version>
+                    <configuration>
+                        <argLine>
+                            @{argLine}
+                            --add-opens java.base/java.lang=ALL-UNNAMED
+                            --add-opens java.base/java.lang.reflect=ALL-UNNAMED
+                            --add-opens java.base/java.util=ALL-UNNAMED
+                            --add-opens java.base/java.io=ALL-UNNAMED
+                        </argLine>
+                    </configuration>
                 </plugin>
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
@@ -250,7 +258,7 @@
             <plugin>
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
-                <version>0.8.4</version>
+                <version>0.8.12</version>
                 <executions>
                     <execution>
                         <goals>