diff --git a/5.1/alpine3.6/Dockerfile b/5.1/alpine3.6/Dockerfile
index f7914c4..f56cd89 100644
--- a/5.1/alpine3.6/Dockerfile
+++ b/5.1/alpine3.6/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.10
+FROM alpine:3.13
 
 ENTRYPOINT ["lua"]
 
diff --git a/5.2/alpine3.6/Dockerfile b/5.2/alpine3.6/Dockerfile
index b854a49..80d1f4e 100644
--- a/5.2/alpine3.6/Dockerfile
+++ b/5.2/alpine3.6/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.10
+FROM alpine:3.13
 
 ENTRYPOINT ["lua"]
 
diff --git a/5.3/alpine3.6/Dockerfile b/5.3/alpine3.6/Dockerfile
index f3fa99d..266c9ab 100644
--- a/5.3/alpine3.6/Dockerfile
+++ b/5.3/alpine3.6/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.10
+FROM alpine:3.13
 
 ENTRYPOINT ["lua"]