diff --git a/bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/hooks/PlaceholderAPIExpansion.java b/bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/hooks/PlaceholderAPIExpansion.java
index a4162ad..b0bbb01 100644
--- a/bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/hooks/PlaceholderAPIExpansion.java
+++ b/bukkit/src/main/java/dev/xhyrom/lighteco/bukkit/hooks/PlaceholderAPIExpansion.java
@@ -6,31 +6,30 @@ import dev.xhyrom.lighteco.common.model.user.User;
 import lombok.RequiredArgsConstructor;
 import me.clip.placeholderapi.expansion.PlaceholderExpansion;
 import org.bukkit.OfflinePlayer;
-import org.bukkit.entity.Player;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 @RequiredArgsConstructor
 public class PlaceholderAPIExpansion extends PlaceholderExpansion {
     private final BukkitLightEcoPlugin plugin;
 
     @Override
-    public @NotNull String getIdentifier() {
+    public @NonNull String getIdentifier() {
         return "lighteco";
     }
 
     @Override
-    public @NotNull String getAuthor() {
+    public @NonNull String getAuthor() {
         return this.plugin.getBootstrap().getLoader().getDescription().getAuthors().toString();
     }
 
     @Override
-    public @NotNull String getVersion() {
+    public @NonNull String getVersion() {
         return this.plugin.getBootstrap().getLoader().getDescription().getVersion();
     }
 
     @Override
-    public @Nullable String onRequest(OfflinePlayer player, @NotNull String params) {
+    public @Nullable String onRequest(OfflinePlayer player, @NonNull String params) {
         String[] args = params.split("_");
         if (args.length < 2) return null;
 
diff --git a/common/build.gradle.kts b/common/build.gradle.kts
index 91998ab..049f144 100644
--- a/common/build.gradle.kts
+++ b/common/build.gradle.kts
@@ -4,6 +4,7 @@ plugins {
 
 dependencies {
     api(project(":lighteco-api"))
+    api("org.checkerframework:checker-qual:3.8.0")
     api("net.kyori:adventure-api:4.12.0") {
         exclude(module = "adventure-bom")
         exclude(module = "checker-qual")
@@ -23,6 +24,5 @@ dependencies {
     compileOnly("org.projectlombok:lombok:1.18.28")
     annotationProcessor("org.projectlombok:lombok:1.18.28")
 
-    compileOnly("org.checkerframework:checker-qual:3.8.0")
     compileOnly("org.jetbrains:annotations:20.1.0")
 }
\ No newline at end of file
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiUserManager.java b/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiUserManager.java
index 89098d2..c65d882 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiUserManager.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/api/impl/ApiUserManager.java
@@ -5,7 +5,6 @@ import dev.xhyrom.lighteco.api.model.user.User;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.jetbrains.annotations.NotNull;
 
 import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
@@ -37,7 +36,7 @@ public class ApiUserManager extends ApiAbstractManager<dev.xhyrom.lighteco.commo
     }
 
     @Override
-    public @NonNull CompletableFuture<Void> saveUsers(@NotNull @NonNull User... users) {
+    public @NonNull CompletableFuture<Void> saveUsers(@NonNull User... users) {
         return this.plugin.getStorage().saveUsers(users);
     }
 
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/memory/MemoryStorageProvider.java b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/memory/MemoryStorageProvider.java
index bdea3e5..0658bf1 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/memory/MemoryStorageProvider.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/memory/MemoryStorageProvider.java
@@ -5,7 +5,6 @@ import dev.xhyrom.lighteco.api.storage.StorageProvider;
 import dev.xhyrom.lighteco.common.plugin.LightEcoPlugin;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.jetbrains.annotations.NotNull;
 
 import java.util.HashMap;
 import java.util.UUID;
@@ -43,7 +42,7 @@ public class MemoryStorageProvider implements StorageProvider {
     }
 
     @Override
-    public void saveUsers(@NotNull @NonNull User... users) {
+    public void saveUsers(@NonNull User... users) {
         for (User user : users) {
             this.userDatabase.put(user.getUniqueId(), user);
         }
diff --git a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStorageProvider.java b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStorageProvider.java
index afc900d..1240330 100644
--- a/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStorageProvider.java
+++ b/common/src/main/java/dev/xhyrom/lighteco/common/storage/provider/sql/SqlStorageProvider.java
@@ -8,7 +8,6 @@ import dev.xhyrom.lighteco.common.storage.StorageType;
 import dev.xhyrom.lighteco.common.storage.provider.sql.connection.ConnectionFactory;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.jetbrains.annotations.NotNull;
 
 import java.math.BigDecimal;
 import java.sql.Connection;
@@ -163,7 +162,7 @@ public class SqlStorageProvider implements StorageProvider {
     }
 
     @Override
-    public void saveUsers(@NotNull @NonNull User... users) throws Exception {
+    public void saveUsers(@NonNull User... users) throws Exception {
         // use transaction
         try (Connection c = this.connectionFactory.getConnection()) {
             try {