diff --git a/examples/config-dev.yaml b/examples/config-dev.yaml
index 344d72dc..b40ea582 100644
--- a/examples/config-dev.yaml
+++ b/examples/config-dev.yaml
@@ -73,14 +73,15 @@ telemetry:
 #   tlsClientCA: examples/grpc-client/ca.crt
 
 # Uncomment this block to enable configuration for the expiration time durations.
+# Is possible to specify units using only s, m and h suffixes.
 # expiry:
 #   deviceRequests: "5m"
 #   signingKeys: "6h"
 #   idTokens: "24h"
 #   refreshTokens:
 #     reuseInterval: "3s"
-#     validIfNotUsedFor: "2190h"
-#     absoluteLifetime: "5000h"
+#     validIfNotUsedFor: "2160h" # 90 days
+#     absoluteLifetime: "3960h" # 165 days
 
 # Options for controlling the logger.
 # logger: