diff --git a/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/KeyRingBuilder.kt b/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/KeyRingBuilder.kt
index af650c4b..c101e2c0 100644
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/KeyRingBuilder.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/KeyRingBuilder.kt
@@ -25,7 +25,6 @@ import java.io.IOException
 import java.security.KeyPairGenerator
 import java.util.*
 
-const val MILLIS_IN_YEAR = 1000L * 60 * 60 * 24 * 365
 
 class KeyRingBuilder : KeyRingBuilderInterface<KeyRingBuilder> {
 
@@ -217,6 +216,8 @@ class KeyRingBuilder : KeyRingBuilderInterface<KeyRingBuilder> {
     }
 
     companion object {
+        const val MILLIS_IN_YEAR = 1000L * 60 * 60 * 24 * 365
+
         @JvmStatic
         fun generateKeyPair(spec: KeySpec): PGPKeyPair {
             spec.keyType.let { type ->