diff --git a/pom.xml b/pom.xml
index 4a7687b..cb646ae 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.2.4</version>
+        <version>2.7.18</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.jetbrains.help</groupId>
@@ -14,7 +14,7 @@
     <name>Jetbrains-Help</name>
     <description>Jetbrains-Help</description>
     <properties>
-        <java.version>21</java.version>
+        <java.version>8</java.version>
     </properties>
     <dependencies>
         <dependency>
diff --git a/src/main/java/com/jetbrains/help/context/LicenseContextHolder.java b/src/main/java/com/jetbrains/help/context/LicenseContextHolder.java
index c1c69e2..f6661be 100644
--- a/src/main/java/com/jetbrains/help/context/LicenseContextHolder.java
+++ b/src/main/java/com/jetbrains/help/context/LicenseContextHolder.java
@@ -21,6 +21,7 @@ import java.security.cert.Certificate;
 import java.security.cert.CertificateEncodingException;
 import java.util.List;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 import static cn.hutool.crypto.asymmetric.SignAlgorithm.SHA1withRSA;
 
@@ -35,7 +36,7 @@ public class LicenseContextHolder {
                         .setCode(productCode)
                         .setFallbackDate(expiryDate)
                         .setPaidUpTo(expiryDate))
-                .toList();
+                .collect(Collectors.toList());
         LicensePart licensePart = new LicensePart()
                 .setLicenseId(licenseId)
                 .setLicenseeName(licensesName)
diff --git a/src/main/java/com/jetbrains/help/context/PluginsContextHolder.java b/src/main/java/com/jetbrains/help/context/PluginsContextHolder.java
index 4b25698..afdb286 100644
--- a/src/main/java/com/jetbrains/help/context/PluginsContextHolder.java
+++ b/src/main/java/com/jetbrains/help/context/PluginsContextHolder.java
@@ -18,6 +18,7 @@ import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
+import java.util.stream.Collectors;
 
 @Slf4j
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
@@ -101,7 +102,7 @@ public class PluginsContextHolder {
                 .stream()
                 .filter(plugin -> !PluginsContextHolder.pluginCacheList.contains(new PluginCache().setId(plugin.getId())))
                 .filter(plugin -> !CharSequenceUtil.equals(plugin.getPricingModel(), "FREE"))
-                .toList();
+                .collect(Collectors.toList());
     }
 
     public static List<PluginCache> pluginConversion(List<PluginList.Plugin> pluginList) {
@@ -117,7 +118,7 @@ public class PluginsContextHolder {
                             .setIcon(PLUGIN_BASIC_URL + plugin.getIcon())
                             ;
                 })
-                .toList();
+                .collect(Collectors.toList());
     }
 
     public static PluginInfo pluginInfo(Long pluginId) {
@@ -147,9 +148,9 @@ public class PluginsContextHolder {
         @Override
         public final boolean equals(Object o) {
             if (this == o) return true;
-            if (!(o instanceof PluginCache that)) return false;
+            if (!(o instanceof PluginCache)) return false;
 
-            return id.equals(that.id);
+            return id.equals(((PluginCache) o).id);
         }
 
         @Override
diff --git a/src/main/java/com/jetbrains/help/controller/OpenApiController.java b/src/main/java/com/jetbrains/help/controller/OpenApiController.java
index 13b9e42..713f240 100644
--- a/src/main/java/com/jetbrains/help/controller/OpenApiController.java
+++ b/src/main/java/com/jetbrains/help/controller/OpenApiController.java
@@ -15,6 +15,7 @@ import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 @RestController
 public class OpenApiController {
@@ -41,12 +42,12 @@ public class OpenApiController {
                     .filter(StrUtil::isNotBlank)
                     .map(productCode -> CharSequenceUtil.splitTrim(productCode, ","))
                     .flatMap(Collection::stream)
-                    .toList();
+                    .collect(Collectors.toList());
             List<String> pluginCodeList = PluginsContextHolder.pluginCacheList()
                     .stream()
                     .map(PluginsContextHolder.PluginCache::getProductCode)
                     .filter(StrUtil::isNotBlank)
-                    .toList();
+                    .collect(Collectors.toList());
             productCodeSet = CollUtil.newHashSet(productCodeList);
             productCodeSet.addAll(pluginCodeList);
         }else {
diff --git a/src/main/java/com/jetbrains/help/route/IndexController.java b/src/main/java/com/jetbrains/help/route/IndexController.java
index 984b6f2..442bee5 100644
--- a/src/main/java/com/jetbrains/help/route/IndexController.java
+++ b/src/main/java/com/jetbrains/help/route/IndexController.java
@@ -23,6 +23,7 @@ import org.springframework.web.bind.annotation.ResponseBody;
 
 import java.io.File;
 import java.util.List;
+import java.util.stream.Collectors;
 
 import static org.springframework.http.HttpHeaders.CONTENT_DISPOSITION;
 import static org.springframework.http.MediaType.APPLICATION_OCTET_STREAM;
@@ -50,10 +51,10 @@ public class IndexController {
         if (CharSequenceUtil.isNotBlank(search)) {
             productCacheList = productCacheList.stream()
                     .filter(productCache -> CharSequenceUtil.containsIgnoreCase(productCache.getName(), search))
-                    .toList();
+                    .collect(Collectors.toList());
             pluginCacheList = pluginCacheList.stream()
                     .filter(pluginCache -> CharSequenceUtil.containsIgnoreCase(pluginCache.getName(), search))
-                    .toList();
+                    .collect(Collectors.toList());
         }
         model.addAttribute("products", productCacheList);
         model.addAttribute("plugins", pluginCacheList);