diff --git a/common/src/main/java/com/adamcalculator/dynamicpack/IDValidator.java b/common/src/main/java/com/adamcalculator/dynamicpack/IDValidator.java
deleted file mode 100644
index a6cab54..0000000
--- a/common/src/main/java/com/adamcalculator/dynamicpack/IDValidator.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.adamcalculator.dynamicpack;
-
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-public class IDValidator {
-    private static final Pattern PATTERN_ID = Pattern.compile("^[a-z0-9]{1,100}$");
-
-    public static boolean isValid(String input) {
-        Matcher matcher = PATTERN_ID.matcher(input);
-        return matcher.matches();
-    }
-}
diff --git a/common/src/main/java/com/adamcalculator/dynamicpack/InputValidator.java b/common/src/main/java/com/adamcalculator/dynamicpack/InputValidator.java
new file mode 100644
index 0000000..696f4ca
--- /dev/null
+++ b/common/src/main/java/com/adamcalculator/dynamicpack/InputValidator.java
@@ -0,0 +1,24 @@
+package com.adamcalculator.dynamicpack;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class InputValidator {
+    private static final Pattern CONTENT_ID_PATTERN = Pattern.compile("^[a-z0-9_:]{2,128}$");
+
+    public static boolean isContentIdValid(String input) {
+        if (input == null) {
+            return false;
+        }
+        Matcher matcher = CONTENT_ID_PATTERN.matcher(input);
+        return matcher.matches();
+    }
+
+    public static boolean isPackNameValid(String input) {
+        if (input == null) {
+            return false;
+        }
+
+        return input.trim().length() < 64 && !input.trim().isEmpty() && !input.contains("\n") && !input.contains("\r") && !input.contains("\b");
+    }
+}
diff --git a/common/src/main/java/com/adamcalculator/dynamicpack/pack/DynamicRepoRemote.java b/common/src/main/java/com/adamcalculator/dynamicpack/pack/DynamicRepoRemote.java
index f0eb91d..2800b06 100644
--- a/common/src/main/java/com/adamcalculator/dynamicpack/pack/DynamicRepoRemote.java
+++ b/common/src/main/java/com/adamcalculator/dynamicpack/pack/DynamicRepoRemote.java
@@ -1,6 +1,7 @@
 package com.adamcalculator.dynamicpack.pack;
 
 import com.adamcalculator.dynamicpack.DynamicPackModBase;
+import com.adamcalculator.dynamicpack.InputValidator;
 import com.adamcalculator.dynamicpack.Mod;
 import com.adamcalculator.dynamicpack.PackUtil;
 import com.adamcalculator.dynamicpack.sync.PackSyncProgress;
@@ -12,7 +13,6 @@
 
 import java.io.IOException;
 import java.nio.file.Path;
-import java.rmi.RemoteException;
 import java.security.NoSuchAlgorithmException;
 import java.util.HashMap;
 import java.util.function.LongConsumer;
@@ -105,11 +105,8 @@ public void onUpdate(FileDownloadConsumer it) {
         }
 
         String remoteName = repoJson.getString("name");
-        if (remoteName.isBlank()) {
-            throw new RuntimeException("Name of remote pack can't be blank");
-        }
-        if (remoteName.trim().length() > 50) {
-            throw new RuntimeException("Length of name pack can't > 50");
+        if (!InputValidator.isPackNameValid(remoteName)) {
+            throw new RuntimeException("Remote name of pack not valid.");
         }
 
 
diff --git a/common/src/main/java/com/adamcalculator/dynamicpack/pack/DynamicRepoSyncProcessV1.java b/common/src/main/java/com/adamcalculator/dynamicpack/pack/DynamicRepoSyncProcessV1.java
index d9d5f30..66e5cd7 100644
--- a/common/src/main/java/com/adamcalculator/dynamicpack/pack/DynamicRepoSyncProcessV1.java
+++ b/common/src/main/java/com/adamcalculator/dynamicpack/pack/DynamicRepoSyncProcessV1.java
@@ -1,7 +1,7 @@
 package com.adamcalculator.dynamicpack.pack;
 
 import com.adamcalculator.dynamicpack.DynamicPackModBase;
-import com.adamcalculator.dynamicpack.IDValidator;
+import com.adamcalculator.dynamicpack.InputValidator;
 import com.adamcalculator.dynamicpack.Mod;
 import com.adamcalculator.dynamicpack.PackUtil;
 import com.adamcalculator.dynamicpack.sync.PackSyncProgress;
@@ -61,7 +61,7 @@ public void close() throws IOException {
 
     private void processContent(JSONObject jsonContent) throws IOException {
         String id = jsonContent.getString("id");
-        if (!IDValidator.isValid(id)) {
+        if (!InputValidator.isContentIdValid(id)) {
             throw new RuntimeException("Id of content is not valid.");
         }
 
diff --git a/common/src/test/java/tests/InputValidatorTest.java b/common/src/test/java/tests/InputValidatorTest.java
new file mode 100644
index 0000000..8ddcf0d
--- /dev/null
+++ b/common/src/test/java/tests/InputValidatorTest.java
@@ -0,0 +1,30 @@
+package tests;
+
+import com.adamcalculator.dynamicpack.InputValidator;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class InputValidatorTest {
+
+    @Test
+    public void testContentId() {
+        Assertions.assertFalse(InputValidator.isContentIdValid(""));
+        Assertions.assertFalse(InputValidator.isContentIdValid(" "));
+        Assertions.assertFalse(InputValidator.isContentIdValid("  "));
+        Assertions.assertFalse(InputValidator.isContentIdValid("   32"));
+        Assertions.assertFalse(InputValidator.isContentIdValid("test\ntest"));
+
+        Assertions.assertTrue(InputValidator.isContentIdValid("__"));
+        Assertions.assertTrue(InputValidator.isContentIdValid("pack:megapack"));
+        Assertions.assertTrue(InputValidator.isContentIdValid("1234567890"));
+        Assertions.assertTrue(InputValidator.isContentIdValid("01"));
+        Assertions.assertTrue(InputValidator.isContentIdValid("test_pack"));
+        Assertions.assertTrue(InputValidator.isContentIdValid("super:mega_puper:"));
+    }
+
+    @Test
+    public void testRemoteName() {
+        Assertions.assertFalse(InputValidator.isPackNameValid("\n"));
+        Assertions.assertTrue(InputValidator.isPackNameValid("__"));
+    }
+}