diff --git a/CHANGELOG.md b/CHANGELOG.md
index 56a3268..cffd20a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 All notable changes to `ssl-certificate` will be documented in this file
 
+## 2.0.1 - 2021-03-30
+
+- fix edge case when using serialized certificates
+
 ## 2.0.0 - 2021-03-30
 
 - require PHP 8+
diff --git a/src/SslCertificate.php b/src/SslCertificate.php
index 81c07d4..7bf26cc 100644
--- a/src/SslCertificate.php
+++ b/src/SslCertificate.php
@@ -86,12 +86,12 @@ public function getOrganization(): string
 
     public function getFingerprint(): string
     {
-        return $this->fingerprint;
+        return $this->fingerprint ?? '';
     }
 
     public function getFingerprintSha256(): string
     {
-        return $this->fingerprintSha256;
+        return $this->fingerprintSha256 ?? '';
     }
 
     public function getAdditionalDomains(): array