diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index 7e7ee62..ac216bc 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="13" />
+    <bytecodeTargetLevel target="14" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/encodings.xml b/.idea/encodings.xml
index 851f280..e1d11e5 100644
--- a/.idea/encodings.xml
+++ b/.idea/encodings.xml
@@ -1,8 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="Encoding">
+  <component name="Encoding" defaultCharsetForPropertiesFiles="UTF-8">
     <file url="file://$PROJECT_DIR$/src/main/java/views/InputPanel.java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/src/main/java/views/MainFrame.java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/src/main/java/views/TablePanel.java" charset="UTF-8" />
+    <file url="PROJECT" charset="UTF-8" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 611e7c8..0a6a341 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -4,8 +4,11 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
+        <option name="delegatedBuild" value="true" />
+        <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="14" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 8a7bff4..c608721 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -4,7 +4,7 @@
   <component name="FrameworkDetectionExcludesConfiguration">
     <file type="web" url="file://$PROJECT_DIR$" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_13" default="true" project-jdk-name="13" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_14" default="true" project-jdk-name="14" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index e21d30a..3b3cbd0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -12,9 +12,16 @@
 }
 
 dependencies {
-    testCompile group: 'junit', name: 'junit', version: '4.12'
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'
 }
 
 tasks.withType(JavaCompile) {
     options.encoding = 'UTF-8'
-}
\ No newline at end of file
+}
+
+test {
+    useJUnitPlatform()
+}
+
+mainClassName = 'Main'
\ No newline at end of file
diff --git a/src/test/java/TestMain.java b/src/test/java/TestMain.java
index ae91a2e..97af7ff 100644
--- a/src/test/java/TestMain.java
+++ b/src/test/java/TestMain.java
@@ -1,10 +1,10 @@
 import java.util.Map;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import resources.StockManagement;
 import values.Item;
 
-import static org.junit.Assert.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 public class TestMain {