diff --git a/src/main/java/de/koudingspawn/vault/vault/impl/SharedVaultResponseMapper.java b/src/main/java/de/koudingspawn/vault/vault/impl/SharedVaultResponseMapper.java
index ac59555..c87659c 100644
--- a/src/main/java/de/koudingspawn/vault/vault/impl/SharedVaultResponseMapper.java
+++ b/src/main/java/de/koudingspawn/vault/vault/impl/SharedVaultResponseMapper.java
@@ -100,7 +100,7 @@ VaultSecret mapJks(VaultResponseData data, VaultJKSConfiguration jksConfiguratio
                     getPassword(jksConfiguration).toCharArray(),
                     publicKeyList);
 
-            if (!StringUtils.isEmpty(jksConfiguration.getCaAlias())) {
+            if (jksConfiguration != null && !StringUtils.isEmpty(jksConfiguration.getCaAlias())) {
                 keyStore.setCertificateEntry(
                     jksConfiguration.getCaAlias(),
                     getPublicKey(data.getIssuing_ca())[0]