diff --git a/Dockerfile b/Dockerfile
index 3b9203f..250b0ff 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Debian GNU/Linux 10 (1.13.10-buster)
-FROM golang:1.13.10-buster
+FROM golang:1.15-buster
 
 # copy entrypoint file
 COPY entrypoint.go /usr/bin/entrypoint.go