diff --git a/pom.xml b/pom.xml
index 14f47cca..c95f46ac 100644
--- a/pom.xml
+++ b/pom.xml
@@ -126,9 +126,15 @@
         </dependency>
 
         <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-core</artifactId>
-            <version>4.11.0</version>
+            <groupId>org.powermock</groupId>
+            <artifactId>powermock-module-junit4</artifactId>
+            <version>2.0.9</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.powermock</groupId>
+            <artifactId>powermock-api-mockito2</artifactId>
+            <version>2.0.9</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
@@ -209,7 +215,7 @@
             <plugin>
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
-                <version>0.8.14</version>
+                <version>0.8.7</version>
                 <executions>
                     <execution>
                         <id>prepare-agent</id>
@@ -295,7 +301,7 @@
                     <plugin>
                         <groupId>org.sonatype.central</groupId>
                         <artifactId>central-publishing-maven-plugin</artifactId>
-                        <version>0.10.0</version>
+                        <version>0.4.0</version>
                         <extensions>true</extensions>
                         <configuration>
                             <publishingServerId>central</publishingServerId>
diff --git a/src/test/java/com/skyflow/utils/HttpUtilityTests.java b/src/test/java/com/skyflow/utils/HttpUtilityTests.java
index c9595bb7..f7214690 100644
--- a/src/test/java/com/skyflow/utils/HttpUtilityTests.java
+++ b/src/test/java/com/skyflow/utils/HttpUtilityTests.java
@@ -6,9 +6,11 @@
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.Mockito;
-import org.mockito.junit.MockitoJUnitRunner;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
 
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
@@ -24,10 +26,13 @@
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.BDDMockito.given;
 
-@RunWith(MockitoJUnitRunner.class)
+@RunWith(PowerMockRunner.class)
+@PrepareForTest({URL.class, HttpURLConnection.class})
 public class HttpUtilityTests {
 
     private static String INVALID_EXCEPTION_THROWN = "Should not have thrown any exception";
+    @InjectMocks
+    HttpUtility httpUtility;
     @Mock
     OutputStream outputStream;
     private String expected;
@@ -55,6 +60,7 @@ protected URLConnection openConnection(final URL arg0) throws IOException {
     }
 
     @Test
+    @PrepareForTest({URL.class, HttpURLConnection.class})
     public void testSendRequest() {
         try {
             given(mockConnection.getRequestProperty("content-type")).willReturn("application/json");
@@ -62,7 +68,7 @@ public void testSendRequest() {
             headers.put("content-type", "application/json");
             JsonObject params = new JsonObject();
             params.addProperty("key", "value");
-            String response = HttpUtility.sendRequest("GET", url, params, headers);
+            String response = httpUtility.sendRequest("GET", url, params, headers);
             Assert.assertEquals(expected, response);
         } catch (Exception e) {
             fail(INVALID_EXCEPTION_THROWN);
@@ -71,6 +77,7 @@ public void testSendRequest() {
 
 
     @Test
+    @PrepareForTest({URL.class, HttpURLConnection.class})
     public void testSendRequestFormData() {
         try {
             given(mockConnection.getRequestProperty("content-type")).willReturn("multipart/form-data");
@@ -78,7 +85,7 @@ public void testSendRequestFormData() {
             headers.put("content-type", "multipart/form-data");
             JsonObject params = new JsonObject();
             params.addProperty("key", "value");
-            String response = HttpUtility.sendRequest("GET", url, params, headers);
+            String response = httpUtility.sendRequest("GET", url, params, headers);
             Assert.assertEquals(expected, response);
         } catch (Exception e) {
             fail(INVALID_EXCEPTION_THROWN);
@@ -86,6 +93,7 @@ public void testSendRequestFormData() {
     }
 
     @Test
+    @PrepareForTest({URL.class, HttpURLConnection.class})
     public void testSendRequestFormURLEncoded() {
         try {
             given(mockConnection.getRequestProperty("content-type")).willReturn("application/x-www-form-urlencoded");
@@ -93,7 +101,7 @@ public void testSendRequestFormURLEncoded() {
             headers.put("content-type", "application/x-www-form-urlencoded");
             JsonObject params = new JsonObject();
             params.addProperty("key", "value");
-            String response = HttpUtility.sendRequest("GET", url, params, headers);
+            String response = httpUtility.sendRequest("GET", url, params, headers);
             Assert.assertEquals(expected, response);
         } catch (Exception e) {
             fail(INVALID_EXCEPTION_THROWN);
@@ -101,10 +109,11 @@ public void testSendRequestFormURLEncoded() {
     }
 
     @Test
+    @PrepareForTest({URL.class, HttpURLConnection.class})
     public void testSendRequestError() {
         try {
             given(mockConnection.getResponseCode()).willReturn(500);
-            String response = HttpUtility.sendRequest("GET", url, null, null);
+            String response = httpUtility.sendRequest("GET", url, null, null);
         } catch (SkyflowException e) {
             Assert.assertEquals(500, e.getHttpCode());
             Assert.assertEquals(new Integer(123), e.getGrpcCode());