diff --git a/server/kapacitors.go b/server/kapacitors.go
index 333eb0c11..4b1f66a82 100644
--- a/server/kapacitors.go
+++ b/server/kapacitors.go
@@ -40,7 +40,7 @@ func (p *postKapacitorRequest) Valid(defaultOrgID string) error {
 		return fmt.Errorf("invalid source URI: %v", err)
 	}
 	if len(url.Scheme) == 0 {
-		return fmt.Errorf("Invalid URL; no URL scheme defined")
+		return fmt.Errorf("invalid URL; no URL scheme defined")
 	}
 
 	return nil
@@ -250,7 +250,7 @@ func (p *patchKapacitorRequest) Valid() error {
 			return fmt.Errorf("invalid source URI: %v", err)
 		}
 		if len(url.Scheme) == 0 {
-			return fmt.Errorf("Invalid URL; no URL scheme defined")
+			return fmt.Errorf("invalid URL; no URL scheme defined")
 		}
 	}
 	return nil
@@ -661,7 +661,7 @@ func (k *KapacitorStatus) Valid() error {
 	if k.Status == "enabled" || k.Status == "disabled" {
 		return nil
 	}
-	return fmt.Errorf("Invalid Kapacitor status: %s", k.Status)
+	return fmt.Errorf("invalid Kapacitor status: %s", k.Status)
 }
 
 // KapacitorRulesStatus proxies PATCH to kapacitor to enable/disable tasks