diff --git a/README.md b/README.md
index 303faea..bf25333 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ Available Commands:
 Flags:
       --colors                     Force output with colors
       --expiry                     Use cache expiry
-      --expiry-interval duration   Port to run the webserver on (default 10m0s)
+      --expiry-interval duration   Interval between cache GC's (default 10m0s)
       --expiry-memory int          Max memory usage in MB (default 128)
       --expiry-shards int          Cache shard count (default 64)
       --expiry-time duration       Lifetime of a cache entry (default 1h0m0s)
diff --git a/cmd/root.go b/cmd/root.go
index 1d51e32..a9dff8a 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -61,7 +61,7 @@ func init() {
 
 	rootCmd.PersistentFlags().Bool("expiry", false, "Use cache expiry")
 	rootCmd.PersistentFlags().Duration("expiry-time", time.Minute*60, "Lifetime of a cache entry")
-	rootCmd.PersistentFlags().Duration("expiry-interval", time.Minute*10, "Port to run the webserver on")
+	rootCmd.PersistentFlags().Duration("expiry-interval", time.Minute*10, "Interval between cache GC's")
 	rootCmd.PersistentFlags().Int("expiry-memory", 128, "Max memory usage in MB")
 	rootCmd.PersistentFlags().Int("expiry-shards", 64, "Cache shard count")