diff --git a/src/main/java/com/cringe_studios/cringe_authenticator_library/impl/HOTP.java b/src/main/java/com/cringe_studios/cringe_authenticator_library/impl/HOTP.java
index 3d94cc6..d4d8643 100644
--- a/src/main/java/com/cringe_studios/cringe_authenticator_library/impl/HOTP.java
+++ b/src/main/java/com/cringe_studios/cringe_authenticator_library/impl/HOTP.java
@@ -60,7 +60,9 @@ public class HOTP extends OTP {
 		
 
 		// compute hmac hash
-		byte[] hash = this.getAlgorithm().hash(secret, text);
+		byte[] hashIncorrectLength = this.getAlgorithm().hash(secret, text);
+		byte[] hash = new byte[160 >> 3 > hashIncorrectLength.length ? 160 >> 3 : hashIncorrectLength.length];
+		System.arraycopy(hashIncorrectLength, 0, hash, 0, hash.length < hashIncorrectLength.length ? hash.length : hashIncorrectLength.length);
 
 		// put selected bytes into result int
 		int offset = hash[hash.length - 1] & 0xf;