diff --git a/modules/caddyhttp/reverseproxy/caddyfile.go b/modules/caddyhttp/reverseproxy/caddyfile.go
index f746ee50..f1f10d19 100644
--- a/modules/caddyhttp/reverseproxy/caddyfile.go
+++ b/modules/caddyhttp/reverseproxy/caddyfile.go
@@ -537,9 +537,9 @@ func (h *Handler) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
 				if !d.NextArg() {
 					return d.ArgErr()
 				}
-				size, err := strconv.Atoi(d.Val())
+				size, err := humanize.ParseBytes(d.Val())
 				if err != nil {
-					return d.Errf("invalid size (bytes): %s", d.Val())
+					return d.Errf("invalid byte size '%s': %v", d.Val(), err)
 				}
 				if d.NextArg() {
 					return d.ArgErr()
diff --git a/modules/caddyhttp/reverseproxy/reverseproxy.go b/modules/caddyhttp/reverseproxy/reverseproxy.go
index 55d3aa8c..f2ac942c 100644
--- a/modules/caddyhttp/reverseproxy/reverseproxy.go
+++ b/modules/caddyhttp/reverseproxy/reverseproxy.go
@@ -783,7 +783,7 @@ func (h *Handler) reverseProxy(rw http.ResponseWriter, req *http.Request, origRe
 				rw.WriteHeader(code)
 
 				// Clear headers coming from the backend
-				// (it's not automatically done by ResponseWriter.WriteHeader() for 1xx responses)
+				// (it's not automatically done by ResponseWriter.WriteHeader() for 1xx responses
 				for k := range header {
 					delete(h, k)
 				}