diff --git a/CHANGELOG.md b/CHANGELOG.md
index 91427d5..80ad852 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 - 🔨 — Add a small web server to browse documentation when developing
 - ✨ — Add new check type: http-to-https (#61)
 - 👷 — Remove Unreleased section from CHANGELOG when publishing documentation
+- 🩹 — Severity of ssl-certificate-expiration’s errors is now UNKNOWN (#60)
 
 ## 0.4.1
 
diff --git a/argos/checks/checks.py b/argos/checks/checks.py
index e42046f..e729f72 100644
--- a/argos/checks/checks.py
+++ b/argos/checks/checks.py
@@ -341,6 +341,8 @@ class SSLCertificateExpiration(BaseCheck):
 
     @classmethod
     async def finalize(cls, config, result, **context):
+        if result.status == Status.ERROR:
+            return result.status, Severity.UNKNOWN
         if result.status != Status.ON_CHECK:
             return result.status, Severity.WARNING