diff --git a/build.gradle b/build.gradle
index 9a6341607f88..cccee9d23ba7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -86,6 +86,7 @@ dependencies {
     implementation group: 'org.openjfx', name: 'javafx-web', version: javafxVersion, classifier: firstOtherPlatform
     implementation group: 'org.openjfx', name: 'javafx-web', version: javafxVersion, classifier: secondOtherPlatform
 
+    implementation group: 'org.apache.commons', name: 'commons-lang3', version: '3.8.1'
     implementation group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.7.0'
     implementation group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-jsr310', version: '2.7.4'
 
diff --git a/src/test/java/seedu/address/ui/GuiUnitTest.java b/src/test/java/seedu/address/ui/GuiUnitTest.java
index d163c5748337..d9a03e693996 100644
--- a/src/test/java/seedu/address/ui/GuiUnitTest.java
+++ b/src/test/java/seedu/address/ui/GuiUnitTest.java
@@ -2,6 +2,7 @@
 
 import java.util.Optional;
 
+import org.apache.commons.lang3.SystemUtils;
 import org.junit.Rule;
 
 import guitests.GuiRobot;
@@ -18,6 +19,12 @@ public abstract class GuiUnitTest {
 
     protected final GuiRobot guiRobot = new GuiRobot();
 
+    static {
+        if (SystemUtils.IS_OS_WINDOWS) {
+            System.load("C:\\Windows\\System32\\WindowsCodecs.dll");
+        }
+    }
+
     /**
      * Retrieves the {@code query} node owned by the {@code rootNode}.
      *