diff --git a/src/main/java/app/attestation/server/attestation/ASN1Parsing.java b/src/main/java/app/attestation/server/attestation/ASN1Parsing.java
index 4377696d..06399bcd 100644
--- a/src/main/java/app/attestation/server/attestation/ASN1Parsing.java
+++ b/src/main/java/app/attestation/server/attestation/ASN1Parsing.java
@@ -23,6 +23,8 @@
 /** Utils to get java representation of ASN1 types. */
 class ASN1Parsing {
 
+  private ASN1Parsing() {}
+
   static boolean getBooleanFromAsn1(ASN1Encodable asn1Value) {
     return getBooleanFromAsn1(asn1Value, true);
   }
diff --git a/src/main/java/app/attestation/server/attestation/Constants.java b/src/main/java/app/attestation/server/attestation/Constants.java
index 87991c11..51d280a7 100644
--- a/src/main/java/app/attestation/server/attestation/Constants.java
+++ b/src/main/java/app/attestation/server/attestation/Constants.java
@@ -105,4 +105,6 @@ public class Constants {
   static final int KM_VERIFIED_BOOT_STATE_FAILED = 3;
   // Unsigned max value of 32-bit integer, 2^32 - 1
   static final long UINT32_MAX = (((long) Integer.MAX_VALUE) << 1) + 1;
+
+  private Constants() {}
 }